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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2013-06-11 17:48:06 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2013-06-11 17:48:06 +0000 |
| commit | d1b6ca23b42ad8180780c0e714e9a900e04785b1 (patch) | |
| tree | ded741e78e15ddf3655076d7d160a119c6b7fbc4 /test | |
| parent | 9e26acb5b55f47a4a963c1535fd6b9cb640fa4b6 (diff) | |
| download | external_llvm-d1b6ca23b42ad8180780c0e714e9a900e04785b1.zip external_llvm-d1b6ca23b42ad8180780c0e714e9a900e04785b1.tar.gz external_llvm-d1b6ca23b42ad8180780c0e714e9a900e04785b1.tar.bz2 | |
Change how globalopt handles aliases in llvm.used.
Instead of a custom implementation of replaceAllUsesWith, we just call
replaceAllUsesWith and recreate llvm.used and llvm.compiler-used.
This change is particularity interesting because it makes llvm see
through what clang is doing with static used functions in extern "C"
contexts. With this change, running clang -O2 in
extern "C" {
__attribute__((used)) static void foo() {}
}
produces
@llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @foo to
i8*)], section "llvm.metadata"
define internal void @foo() #0 {
entry:
ret void
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183756 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/GlobalOpt/alias-used.ll | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/test/Transforms/GlobalOpt/alias-used.ll b/test/Transforms/GlobalOpt/alias-used.ll index f91579b..758e469 100644 --- a/test/Transforms/GlobalOpt/alias-used.ll +++ b/test/Transforms/GlobalOpt/alias-used.ll @@ -2,16 +2,21 @@ @c = global i8 42 +@i = internal global i8 42 +; CHECK: @ia = internal global i8 42 +@ia = alias internal i8* @i + @llvm.used = appending global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca], section "llvm.metadata" -; CHECK: @llvm.used = appending global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca], section "llvm.metadata" +; CHECK-DAG: @llvm.used = appending global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca], section "llvm.metadata" -@llvm.compiler_used = appending global [2 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @fa3 to i8*)], section "llvm.metadata" +@llvm.compiler_used = appending global [4 x i8*] [i8* bitcast (void ()* @fa3 to i8*), i8* bitcast (void ()* @fa to i8*), i8* @ia, i8* @i], section "llvm.metadata" +; CHECK-DAG: @llvm.compiler_used = appending global [2 x i8*] [i8* bitcast (void ()* @fa3 to i8*), i8* @ia], section "llvm.metadata" @sameAsUsed = global [3 x i8*] [i8* bitcast (void ()* @fa to i8*), i8* bitcast (void ()* @f to i8*), i8* @ca] -; CHECK: @sameAsUsed = global [3 x i8*] [i8* bitcast (void ()* @f to i8*), i8* bitcast (void ()* @f to i8*), i8* @c] +; CHECK-DAG: @sameAsUsed = global [3 x i8*] [i8* bitcast (void ()* @f to i8*), i8* bitcast (void ()* @f to i8*), i8* @c] @other = global i32* bitcast (void ()* @fa to i32*) -; CHECK: @other = global i32* bitcast (void ()* @f to i32*) +; CHECK-DAG: @other = global i32* bitcast (void ()* @f to i32*) @fa = alias internal void ()* @f ; CHECK: @fa = alias internal void ()* @f |