From 4ad8ec351afba3bb7b037b24a3bee1589a10780a Mon Sep 17 00:00:00 2001
From: Jyun-Yan You <jyyou@cs.nctu.edu.tw>
Date: Mon, 8 Apr 2013 21:21:11 +0800
Subject: [PATCH 1/2] fix index out of bounds error of x86_64 ABI

---
 src/librustc/middle/trans/cabi_x86_64.rs |  4 ++--
 src/test/run-pass/issue-5754.rs          | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 src/test/run-pass/issue-5754.rs

diff --git a/src/librustc/middle/trans/cabi_x86_64.rs b/src/librustc/middle/trans/cabi_x86_64.rs
index 0e4bf5ce574..fa85588cb0f 100644
--- a/src/librustc/middle/trans/cabi_x86_64.rs
+++ b/src/librustc/middle/trans/cabi_x86_64.rs
@@ -256,10 +256,10 @@ fn classify_ty(ty: TypeRef) -> ~[x86_64_reg_class] {
                         cls[i] = sse_int_class;
                     } else if is_sse(cls[i]) {
                         i += 1;
-                        while cls[i] == sseup_class { i += 1u; }
+                        while i != e && cls[i] == sseup_class { i += 1u; }
                     } else if cls[i] == x87_class {
                         i += 1;
-                        while cls[i] == x87up_class { i += 1u; }
+                        while i != e && cls[i] == x87up_class { i += 1u; }
                     } else {
                         i += 1;
                     }
diff --git a/src/test/run-pass/issue-5754.rs b/src/test/run-pass/issue-5754.rs
new file mode 100644
index 00000000000..003701b7a20
--- /dev/null
+++ b/src/test/run-pass/issue-5754.rs
@@ -0,0 +1,19 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+struct S {
+    r: float
+}
+
+extern "C" {
+    fn rust_dbg_extern_identity_double(arg1: S) -> float;
+}
+
+pub fn main() {}

From 685c4d0b76b26439905b0676069818e757913319 Mon Sep 17 00:00:00 2001
From: Jyun-Yan You <jyyou.tw@gmail.com>
Date: Sun, 14 Apr 2013 13:15:46 +0800
Subject: [PATCH 2/2] add rust_dbg_extern_identity_TwoDoubles to prevent
 check-fast failure

---
 src/rt/rust_builtin.cpp         | 10 ++++++++++
 src/rt/rustrt.def.in            |  1 +
 src/test/run-pass/issue-5754.rs |  7 ++++---
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index f586e05772b..3c6cc9d9245 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -866,6 +866,16 @@ rust_dbg_extern_identity_TwoU64s(TwoU64s u) {
     return u;
 }
 
+struct TwoDoubles {
+    double one;
+    double two;
+};
+
+extern "C" CDECL TwoDoubles
+rust_dbg_extern_identity_TwoDoubles(TwoDoubles u) {
+    return u;
+}
+
 extern "C" CDECL double
 rust_dbg_extern_identity_double(double u) {
     return u;
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index 59fd8991622..73dbe661d3f 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -199,6 +199,7 @@ rust_opendir
 rust_dbg_extern_identity_u32
 rust_dbg_extern_identity_u64
 rust_dbg_extern_identity_TwoU64s
+rust_dbg_extern_identity_TwoDoubles
 rust_dbg_extern_identity_double
 rust_dbg_extern_identity_u8
 rust_get_rt_env
diff --git a/src/test/run-pass/issue-5754.rs b/src/test/run-pass/issue-5754.rs
index 003701b7a20..c440fe525ee 100644
--- a/src/test/run-pass/issue-5754.rs
+++ b/src/test/run-pass/issue-5754.rs
@@ -8,12 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-struct S {
-    r: float
+struct TwoDoubles {
+    r: float,
+    i: float
 }
 
 extern "C" {
-    fn rust_dbg_extern_identity_double(arg1: S) -> float;
+    fn rust_dbg_extern_identity_TwoDoubles(arg1: TwoDoubles) -> TwoDoubles;
 }
 
 pub fn main() {}