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 -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 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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static int pvt;
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#pragma omp threadprivate(pvt)
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#pragma omp target parallel for simd // expected-error {{unexpected OpenMP directive '#pragma omp target parallel for simd'}}
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int main(int argc, char **argv) {
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#pragma omp target parallel for simd { // expected-warning {{extra tokens at the end of '#pragma omp target 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 target parallel for simd ( // expected-warning {{extra tokens at the end of '#pragma omp target 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 target parallel for simd[ // expected-warning {{extra tokens at the end of '#pragma omp target 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 target parallel for simd] // expected-warning {{extra tokens at the end of '#pragma omp target 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 target parallel for simd) // expected-warning {{extra tokens at the end of '#pragma omp target 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 target parallel for simd } // expected-warning {{extra tokens at the end of '#pragma omp target 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 target 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 target parallel for simd' are ignored}}
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#pragma omp target 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 target 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 target 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 target 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 target 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 target 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 target 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 target parallel for simd
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for (int n = 0; n < 100; ++n) {
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}
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#pragma omp target parallel for simd copyin(pvt) // expected-error {{unexpected OpenMP clause 'copyin' in directive '#pragma omp target parallel for 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 parallel for simd ordered ordered // expected-error {{directive '#pragma omp target 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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}
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