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Test case for r151429/r151430, which ensures llvm.lifetime intrinsics are not 

being emitted at -O0, but are emitted when optimizations are enabled.

llvm-svn: 151533
This commit is contained in:
Chad Rosier 2012-02-27 18:45:03 +00:00
parent 29d1930868
commit d6a56db7b6
1 changed files with 23 additions and 0 deletions
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23
clang/test/CodeGen/lifetime.c Normal file
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@ -0,0 +1,23 @@
// RUN: %clang -S -emit-llvm -o - -O0 %s | FileCheck %s -check-prefix=O0
// RUN: %clang -S -emit-llvm -o - -O1 %s | FileCheck %s -check-prefix=O1
// RUN: %clang -S -emit-llvm -o - -O2 %s | FileCheck %s -check-prefix=O2
// RUN: %clang -S -emit-llvm -o - -O3 %s | FileCheck %s -check-prefix=O3
extern void use(char *a);
__attribute__((always_inline)) void helper_no_markers() {
char a;
use(&a);
}
void lifetime_test() {
// O0: lifetime_test
// O1: lifetime_test
// O2: lifetime_test
// O3: lifetime_test
// O0-NOT: @llvm.lifetime.start
// O1: @llvm.lifetime.start
// O2: @llvm.lifetime.start
// O3: @llvm.lifetime.start
helper_no_markers();
}