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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
102 lines
3.6 KiB
C++
102 lines
3.6 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 target teams distribute
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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 teams distribute // expected-error {{unexpected OpenMP directive '#pragma omp target teams distribute'}}
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int main(int argc, char **argv) {
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#pragma omp target teams distribute { // expected-warning {{extra tokens at the end of '#pragma omp target teams distribute' 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 teams distribute ( // expected-warning {{extra tokens at the end of '#pragma omp target teams distribute' 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 teams distribute[ // expected-warning {{extra tokens at the end of '#pragma omp target teams distribute' 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 teams distribute] // expected-warning {{extra tokens at the end of '#pragma omp target teams distribute' 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 teams distribute) // expected-warning {{extra tokens at the end of '#pragma omp target teams distribute' 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 teams distribute } // expected-warning {{extra tokens at the end of '#pragma omp target teams distribute' 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 teams distribute
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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 teams distribute' are ignored}}
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#pragma omp target teams distribute 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 teams distribute
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp target teams distribute
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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 teams distribute
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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 teams distribute default(none) // expected-note {{explicit data sharing attribute requested here}}
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for (int i = 0; i < 10; ++i)
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++argc; // expected-error {{variable 'argc' must have explicitly specified data sharing attributes}}
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goto L2; // expected-error {{use of undeclared label 'L2'}}
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#pragma omp target teams distribute
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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 teams distribute
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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 teams distribute
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for (int n = 0; n < 100; ++n) {
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}
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#pragma omp target teams distribute copyin(pvt) // expected-error {{unexpected OpenMP clause 'copyin' in directive '#pragma omp target teams distribute'}}
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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 teams distribute ordered // expected-error {{unexpected OpenMP clause 'ordered' in directive '#pragma omp target teams distribute'}}
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for (int i = 0; i < 16; ++i)
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;
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}
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