c2c21ef9d2
Summary: Some OpenMP clauses rely on the values of the variables. If the variable is not initialized and used in OpenMP clauses that depend on the variables values, it should be reported that the uninitialized variable is used in the OpenMP clause expression. This patch adds initial processing for uninitialized variables in OpenMP constructs. Currently, it checks for use of the uninitialized variables in the structured blocks. Reviewers: NoQ, Szelethus, dcoughlin, xazax.hun, a.sidorin, george.karpenkov, szepet Subscribers: rnkovacs, guansong, jfb, jdoerfert, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D64356 llvm-svn: 365786
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
// RUN: %clang_cc1 -verify -fopenmp -std=c++11 %s -Wuninitialized
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// RUN: %clang_cc1 -verify -fopenmp-simd -std=c++11 %s -Wuninitialized
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void xxx(int argc) {
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int x; // expected-note {{initialize the variable 'x' to silence this warning}}
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#pragma omp target simd
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for (int i = 0; i < 10; ++i)
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argc = x; // expected-warning {{variable 'x' is uninitialized when used here}}
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}
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void foo() {
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}
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static int pvt;
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#pragma omp threadprivate(pvt)
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#pragma omp target simd // expected-error {{unexpected OpenMP directive '#pragma omp target simd'}}
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int main(int argc, char **argv) {
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#pragma omp target simd { // expected-warning {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd ( // expected-warning {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd[ // expected-warning {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd] // expected-warning {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd) // expected-warning {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd } // expected-warning {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd
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for (int i = 0; i < argc; ++i)
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foo();
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// expected-warning@+1 {{extra tokens at the end of '#pragma omp target simd' are ignored}}
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#pragma omp target simd unknown()
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for (int i = 0; i < argc; ++i)
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foo();
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L1:
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target simd
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for (int i = 0; i < argc; ++i) {
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goto L1; // expected-error {{use of undeclared label 'L1'}}
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argc++;
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}
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for (int i = 0; i < 10; ++i) {
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switch (argc) {
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case (0):
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#pragma omp target simd
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for (int i = 0; i < argc; ++i) {
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foo();
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break; // expected-error {{'break' statement cannot be used in OpenMP for loop}}
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continue;
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}
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default:
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break;
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}
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}
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#pragma omp target simd default(none) // expected-error {{unexpected OpenMP clause 'default' in directive '#pragma omp target simd'}}
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for (int i = 0; i < 10; ++i)
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++argc;
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goto L2; // expected-error {{use of undeclared label 'L2'}}
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#pragma omp target simd
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for (int i = 0; i < argc; ++i)
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L2:
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foo();
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#pragma omp target simd
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for (int i = 0; i < argc; ++i) {
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return 1; // expected-error {{cannot return from OpenMP region}}
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}
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[[]] // expected-error {{an attribute list cannot appear here}}
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#pragma omp target simd
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for (int n = 0; n < 100; ++n) {
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}
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#pragma omp target simd copyin(pvt) // expected-error {{unexpected OpenMP clause 'copyin' in directive '#pragma omp target simd'}}
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for (int n = 0; n < 100; ++n) {}
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return 0;
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}
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void test_ordered() {
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#pragma omp target simd ordered // expected-error {{unexpected OpenMP clause 'ordered' in directive '#pragma omp target simd'}}
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for (int i = 0; i < 16; ++i)
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;
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}
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