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From his comment in PR12168, Eli seems confused about the alignment assumptions 

we're making.  We only ignore implicit casts.  Add a testcase showing that
we get the right behavior with explicit casts.

llvm-svn: 151994
This commit is contained in:
Chris Lattner 2012-03-04 00:56:24 +00:00
parent aaa18fad7d
commit 332673d39d
1 changed files with 5 additions and 1 deletions
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6
clang/test/CodeGen/builtin-memfns.c
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@ -52,9 +52,13 @@ int test6(char *X) {
// CHECK: @test7 // CHECK: @test7
// PR12094 // PR12094
int test7(int *p) { int test7(int *p) {
struct snd_pcm_hw_params_t* hwparams; // incomplete type.
// CHECK: call void @llvm.memset{{.*}}256, i32 4, i1 false) // CHECK: call void @llvm.memset{{.*}}256, i32 4, i1 false)
__builtin_memset(p, 0, 256); // Should be alignment = 4 __builtin_memset(p, 0, 256); // Should be alignment = 4
struct snd_pcm_hw_params_t* hwparams; // incomplete type.
// CHECK: call void @llvm.memset{{.*}}256, i32 1, i1 false)
__builtin_memset((char*)p, 0, 256); // Should be alignment = 1
__builtin_memset(hwparams, 0, 256); // No crash alignment = 1 __builtin_memset(hwparams, 0, 256); // No crash alignment = 1
// CHECK: call void @llvm.memset{{.*}}256, i32 1, i1 false) // CHECK: call void @llvm.memset{{.*}}256, i32 1, i1 false)