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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
103 lines
3.5 KiB
C++
103 lines
3.5 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 parallel for 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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#pragma omp parallel for simd // expected-error {{unexpected OpenMP directive '#pragma omp parallel for simd'}}
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int main(int argc, char **argv) {
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#pragma omp parallel for simd { // expected-warning {{extra tokens at the end of '#pragma omp parallel for 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 parallel for simd ( // expected-warning {{extra tokens at the end of '#pragma omp parallel for 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 parallel for simd[ // expected-warning {{extra tokens at the end of '#pragma omp parallel for 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 parallel for simd] // expected-warning {{extra tokens at the end of '#pragma omp parallel for 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 parallel for simd) // expected-warning {{extra tokens at the end of '#pragma omp parallel for 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 parallel for simd } // expected-warning {{extra tokens at the end of '#pragma omp parallel for 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 parallel for 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 parallel for simd' are ignored}}
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#pragma omp parallel for 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 parallel for simd
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for (int i = 0; i < argc; ++i)
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foo();
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#pragma omp parallel for 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 parallel for 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 parallel for simd 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 parallel for 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 parallel for 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 parallel for simd
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for (int n = 0; n < 100; ++n) {
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}
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return 0;
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}
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void test_ordered() {
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#pragma omp parallel for simd ordered ordered // expected-error {{directive '#pragma omp parallel for simd' cannot contain more than one 'ordered' clause}}
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for (int i = 0; i < 16; ++i)
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;
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#pragma omp parallel for simd ordered
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for (int i = 0; i < 16; ++i)
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;
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// expected-error@+1 {{'ordered' clause with a parameter can not be specified in '#pragma omp parallel for simd' directive}}
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#pragma omp parallel for simd ordered(1)
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for (int i = 0; i < 16; ++i)
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;
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}
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