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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
96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
// RUN: %clang_cc1 -verify -fopenmp -ferror-limit 100 -std=c++11 -o - %s -Wuninitialized
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// RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 -std=c++11 -o - %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 parallel sections
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{
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argc = x; // expected-warning {{variable 'x' is uninitialized when used here}}
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}
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}
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void foo() {
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}
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#pragma omp parallel sections // expected-error {{unexpected OpenMP directive '#pragma omp parallel sections'}}
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int main(int argc, char **argv) {
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#pragma omp parallel sections {// expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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{
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foo();
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}
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#pragma omp parallel sections( // expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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{
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foo();
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}
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#pragma omp parallel sections[ // expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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{
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foo();
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}
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#pragma omp parallel sections] // expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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{
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foo();
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}
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#pragma omp parallel sections) // expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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{
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foo();
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}
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#pragma omp parallel sections } // expected-warning {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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{
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foo();
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}
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// expected-warning@+1 {{extra tokens at the end of '#pragma omp parallel sections' are ignored}}
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#pragma omp parallel sections unknown()
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{
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foo();
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#pragma omp section
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L1:
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foo();
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}
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#pragma omp parallel sections
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{
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;
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}
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#pragma omp parallel sections
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{
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goto L1; // expected-error {{use of undeclared label 'L1'}}
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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 parallel sections
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{
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foo();
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break; // expected-error {{'break' statement not in loop or switch statement}}
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continue; // expected-error {{'continue' statement not in loop statement}}
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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 parallel sections default(none) // expected-note {{explicit data sharing attribute requested here}}
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{
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++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
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}
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goto L2; // expected-error {{use of undeclared label 'L2'}}
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#pragma omp parallel sections
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{
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L2:
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foo();
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}
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#pragma omp parallel sections
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{
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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 parallel sections
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{
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}
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return 0;
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}
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