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| author | Chris Lattner <sabre@nondot.org> | 2007-12-29 06:41:28 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-12-29 06:41:28 +0000 |
| commit | 112dedc520c1aec387a6fef1c8f512a7d27f0570 (patch) | |
| tree | 65c56b163f38ef5fbd9d996e8d81c7e006ce31d6 /test/CodeGen/X86/fp-stack-ret-store.ll | |
| parent | 3c87285af63bc6d9b93f8eefe46ce9fea063d66c (diff) | |
| download | llvm-112dedc520c1aec387a6fef1c8f512a7d27f0570.tar.gz llvm-112dedc520c1aec387a6fef1c8f512a7d27f0570.tar.bz2 llvm-112dedc520c1aec387a6fef1c8f512a7d27f0570.tar.xz | |
avoid going through a stack slot to convert from fpstack to xmm reg
if we are just going to store it back anyway. This improves things
like:
double foo();
void bar(double *P) { *P = foo(); }
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45399 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/fp-stack-ret-store.ll')
| -rw-r--r-- | test/CodeGen/X86/fp-stack-ret-store.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fp-stack-ret-store.ll b/test/CodeGen/X86/fp-stack-ret-store.ll new file mode 100644 index 0000000000..87829649a3 --- /dev/null +++ b/test/CodeGen/X86/fp-stack-ret-store.ll @@ -0,0 +1,15 @@ +; RUN: llvm-as < %s | llc | not grep movss +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i686-apple-darwin8" + +; This should store directly into P from the FP stack. It should not +; go through a stack slot to get there. + +define void @bar(double* %P) { +entry: + %tmp = tail call double (...)* @foo( ) ; <double> [#uses=1] + store double %tmp, double* %P, align 8 + ret void +} + +declare double @foo(...) |