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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
84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
// RUN: %clang_cc1 -verify -fopenmp -std=c++11 -o - %s -Wuninitialized
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// RUN: %clang_cc1 -verify -fopenmp-simd -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 target teams
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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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#pragma omp target teams // expected-error {{unexpected OpenMP directive '#pragma omp target teams'}}
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int main(int argc, char **argv) {
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#pragma omp target teams { // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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#pragma omp target teams ( // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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#pragma omp target teams [ // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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#pragma omp target teams ] // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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#pragma omp target teams ) // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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#pragma omp target teams } // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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#pragma omp target teams
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foo();
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#pragma omp target teams unknown() // expected-warning {{extra tokens at the end of '#pragma omp target teams' are ignored}}
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foo();
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L1:
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foo();
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#pragma omp target teams
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;
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#pragma omp target teams
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{
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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 teams
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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 target teams default(none) // expected-note {{explicit data sharing attribute requested here}}
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++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
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#pragma omp target teams default(none) // expected-note {{explicit data sharing attribute requested here}}
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#pragma omp parallel num_threads(argc) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
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;
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#pragma omp target teams default(none) // expected-note {{explicit data sharing attribute requested here}}
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{
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#pragma omp parallel num_threads(argc) // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
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;
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}
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goto L2; // expected-error {{use of undeclared label 'L2'}}
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#pragma omp target teams
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L2:
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foo();
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#pragma omp target teams
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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 target teams
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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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