From c2c21ef9d2b37da6a8cc6322e4cd13fff3fe10b3 Mon Sep 17 00:00:00 2001 From: Alexey Bataev Date: Thu, 11 Jul 2019 14:54:17 +0000 Subject: [OPENMP]Initial fix PR42392: Improve -Wuninitialized warnings for OpenMP programs. 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 --- clang/test/OpenMP/atomic_messages.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'clang/test/OpenMP/atomic_messages.c') diff --git a/clang/test/OpenMP/atomic_messages.c b/clang/test/OpenMP/atomic_messages.c index bace18aba9e..abc703d578d 100644 --- a/clang/test/OpenMP/atomic_messages.c +++ b/clang/test/OpenMP/atomic_messages.c @@ -2,6 +2,12 @@ // RUN: %clang_cc1 -verify -fopenmp-simd -ferror-limit 100 %s -Wuninitialized +void xxx(int argc) { + int x; // expected-note {{initialize the variable 'x' to silence this warning}} +#pragma omp atomic read + argc = x; // expected-warning {{variable 'x' is uninitialized when used here}} +} + int foo() { L1: foo(); -- cgit v1.2.3