[NFC][CVP] Add tests for SDiv/SRem narrowing
This commit is contained in:
Roman Lebedev
parent
4977eadee5
commit
cb10d5d714
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@ -254,3 +254,403 @@ end:
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%div = sdiv i32 %x, %y
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ret i32 %div
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}
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; Ok, but what about narrowing sdiv in general?
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; If both operands are i15, it's uncontroversial - we can truncate to i16
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define i64 @test11_i15_i15(i64 %x, i64 %y) {
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; CHECK-LABEL: @test11_i15_i15(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 16383
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -16384
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 16383
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -16384
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 16383
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -16384
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 16383
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -16384
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; But if operands are i16, we can only truncate to i32, because we can't
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; rule out UB of i16 INT_MIN s/ i16 -1
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define i64 @test12_i16_i16(i64 %x, i64 %y) {
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; CHECK-LABEL: @test12_i16_i16(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 32767
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -32768
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 32767
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -32768
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; But if divident is i16, and divisor is u15, then we know that i16 is UB-safe.
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define i64 @test13_i16_u15(i64 %x, i64 %y) {
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; CHECK-LABEL: @test13_i16_u15(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp ule i64 [[Y:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 32767
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -32768
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call void @llvm.assume(i1 %c1)
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%c2 = icmp ule i64 %y, 32767
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call void @llvm.assume(i1 %c2)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; And likewise, if we know that if the divident is never i16 INT_MIN,
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; we can truncate to i16.
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define i64 @test14_i16safe_i16(i64 %x, i64 %y) {
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; CHECK-LABEL: @test14_i16safe_i16(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i64 [[X]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 32767
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sgt i64 %x, -32768
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 32767
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -32768
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; Of course, both of the conditions can happen at once.
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define i64 @test15_i16safe_u15(i64 %x, i64 %y) {
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; CHECK-LABEL: @test15_i16safe_u15(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i64 [[X]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp ule i64 [[Y:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 32767
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sgt i64 %x, -32768
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call void @llvm.assume(i1 %c1)
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%c2 = icmp ule i64 %y, 32767
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call void @llvm.assume(i1 %c2)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; We at most truncate to i8
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define i64 @test16_i4_i4(i64 %x, i64 %y) {
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; CHECK-LABEL: @test16_i4_i4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 3
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -4
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 3
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -4
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 3
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -4
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 3
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -4
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; And we round up to the powers of two
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define i64 @test17_i9_i9(i64 %x, i64 %y) {
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; CHECK-LABEL: @test17_i9_i9(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 255
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -256
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 255
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -256
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 255
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -256
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 255
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -256
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; Don't widen the operation to the next power of two if it wasn't a power of two.
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define i9 @test18_i9_i9(i9 %x, i9 %y) {
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; CHECK-LABEL: @test18_i9_i9(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i9 [[X:%.*]], 255
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i9 [[X]], -256
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i9 [[Y:%.*]], 255
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i9 [[Y]], -256
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i9 [[X]], [[Y]]
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; CHECK-NEXT: ret i9 [[DIV]]
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;
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entry:
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%c0 = icmp sle i9 %x, 255
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i9 %x, -256
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i9 %y, 255
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i9 %y, -256
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i9 %x, %y
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ret i9 %div
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}
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define i10 @test19_i10_i10(i10 %x, i10 %y) {
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; CHECK-LABEL: @test19_i10_i10(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i10 [[X:%.*]], 255
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i10 [[X]], -256
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i10 [[Y:%.*]], 255
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i10 [[Y]], -256
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i10 [[X]], [[Y]]
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; CHECK-NEXT: ret i10 [[DIV]]
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;
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entry:
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%c0 = icmp sle i10 %x, 255
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i10 %x, -256
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i10 %y, 255
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i10 %y, -256
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i10 %x, %y
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ret i10 %div
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}
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; Note that we need to take the maximal bitwidth, in which both of the operands are representable!
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define i64 @test20_i16_i18(i64 %x, i64 %y) {
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; CHECK-LABEL: @test20_i16_i18(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 16383
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -16384
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 65535
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -65536
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 16383
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -16384
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 65535
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -65536
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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define i64 @test21_i18_i16(i64 %x, i64 %y) {
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; CHECK-LABEL: @test21_i18_i16(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 65535
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -65536
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
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; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 16383
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; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
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; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -16384
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; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
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; CHECK-NEXT: br label [[END:%.*]]
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; CHECK: end:
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; CHECK-NEXT: [[DIV:%.*]] = sdiv i64 [[X]], [[Y]]
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; CHECK-NEXT: ret i64 [[DIV]]
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;
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entry:
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%c0 = icmp sle i64 %x, 65535
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call void @llvm.assume(i1 %c0)
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%c1 = icmp sge i64 %x, -65536
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call void @llvm.assume(i1 %c1)
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%c2 = icmp sle i64 %y, 16383
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call void @llvm.assume(i1 %c2)
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%c3 = icmp sge i64 %y, -16384
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call void @llvm.assume(i1 %c3)
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br label %end
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end:
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%div = sdiv i64 %x, %y
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ret i64 %div
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}
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; Ensure that we preserve exact-ness
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define i64 @test22_i16_i16(i64 %x, i64 %y) {
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; CHECK-LABEL: @test22_i16_i16(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
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; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
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; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -32768
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; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = sdiv exact i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 32767
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -32768
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 32767
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -32768
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = sdiv exact i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
|
|
|||
|
|
@ -167,3 +167,369 @@ end:
|
|||
%rem = srem i16 %x, %y
|
||||
ret i16 %rem
|
||||
}
|
||||
|
||||
; Ok, but what about narrowing srem in general?
|
||||
|
||||
; If both operands are i15, it's uncontroversial - we can truncate to i16
|
||||
define i64 @test11_i15_i15(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test11_i15_i15(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 16383
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -16384
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 16383
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -16384
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 16383
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -16384
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 16383
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -16384
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; But if operands are i16, we can only truncate to i32, because we can't
|
||||
; rule out UB of i16 INT_MIN s/ i16 -1
|
||||
define i64 @test12_i16_i16(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test12_i16_i16(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 32767
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -32768
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 32767
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -32768
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; But if divident is i16, and divisor is u15, then we know that i16 is UB-safe.
|
||||
define i64 @test13_i16_u15(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test13_i16_u15(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp ule i64 [[Y:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 32767
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -32768
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp ule i64 %y, 32767
|
||||
call void @llvm.assume(i1 %c2)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; And likewise, if we know that if the divident is never i16 INT_MIN,
|
||||
; we can truncate to i16.
|
||||
define i64 @test14_i16safe_i16(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test14_i16safe_i16(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sgt i64 [[X]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 32767
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sgt i64 %x, -32768
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 32767
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -32768
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; Of course, both of the conditions can happen at once.
|
||||
define i64 @test15_i16safe_u15(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test15_i16safe_u15(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sgt i64 [[X]], -32768
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp ule i64 [[Y:%.*]], 32767
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 32767
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sgt i64 %x, -32768
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp ule i64 %y, 32767
|
||||
call void @llvm.assume(i1 %c2)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; We at most truncate to i8
|
||||
define i64 @test16_i4_i4(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test16_i4_i4(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 3
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -4
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 3
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -4
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 3
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -4
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 3
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -4
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; And we round up to the powers of two
|
||||
define i64 @test17_i9_i9(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test17_i9_i9(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 255
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -256
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 255
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -256
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 255
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -256
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 255
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -256
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
||||
; Don't widen the operation to the next power of two if it wasn't a power of two.
|
||||
define i9 @test18_i9_i9(i9 %x, i9 %y) {
|
||||
; CHECK-LABEL: @test18_i9_i9(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i9 [[X:%.*]], 255
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i9 [[X]], -256
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i9 [[Y:%.*]], 255
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i9 [[Y]], -256
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i9 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i9 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i9 %x, 255
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i9 %x, -256
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i9 %y, 255
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i9 %y, -256
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i9 %x, %y
|
||||
ret i9 %div
|
||||
}
|
||||
define i10 @test19_i10_i10(i10 %x, i10 %y) {
|
||||
; CHECK-LABEL: @test19_i10_i10(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i10 [[X:%.*]], 255
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i10 [[X]], -256
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i10 [[Y:%.*]], 255
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i10 [[Y]], -256
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i10 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i10 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i10 %x, 255
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i10 %x, -256
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i10 %y, 255
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i10 %y, -256
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i10 %x, %y
|
||||
ret i10 %div
|
||||
}
|
||||
|
||||
; Note that we need to take the maximal bitwidth, in which both of the operands are representable!
|
||||
define i64 @test20_i16_i18(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test20_i16_i18(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 16383
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -16384
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 65535
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -65536
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 16383
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -16384
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 65535
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -65536
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
define i64 @test21_i18_i16(i64 %x, i64 %y) {
|
||||
; CHECK-LABEL: @test21_i18_i16(
|
||||
; CHECK-NEXT: entry:
|
||||
; CHECK-NEXT: [[C0:%.*]] = icmp sle i64 [[X:%.*]], 65535
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C0]])
|
||||
; CHECK-NEXT: [[C1:%.*]] = icmp sge i64 [[X]], -65536
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C1]])
|
||||
; CHECK-NEXT: [[C2:%.*]] = icmp sle i64 [[Y:%.*]], 16383
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C2]])
|
||||
; CHECK-NEXT: [[C3:%.*]] = icmp sge i64 [[Y]], -16384
|
||||
; CHECK-NEXT: call void @llvm.assume(i1 [[C3]])
|
||||
; CHECK-NEXT: br label [[END:%.*]]
|
||||
; CHECK: end:
|
||||
; CHECK-NEXT: [[DIV:%.*]] = srem i64 [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret i64 [[DIV]]
|
||||
;
|
||||
entry:
|
||||
%c0 = icmp sle i64 %x, 65535
|
||||
call void @llvm.assume(i1 %c0)
|
||||
%c1 = icmp sge i64 %x, -65536
|
||||
call void @llvm.assume(i1 %c1)
|
||||
|
||||
%c2 = icmp sle i64 %y, 16383
|
||||
call void @llvm.assume(i1 %c2)
|
||||
%c3 = icmp sge i64 %y, -16384
|
||||
call void @llvm.assume(i1 %c3)
|
||||
br label %end
|
||||
|
||||
end:
|
||||
%div = srem i64 %x, %y
|
||||
ret i64 %div
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue