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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 | 8013bd339b571ce36e2f8f20e40411b3c19446f8 (patch) | |
| tree | 243e87d2798a5971b34ba1916fdd52e2671b22d2 /llvm/test/CodeGen | |
| parent | 3f9c6a726083b38fd04afdb36e6716ee5dc4ed67 (diff) | |
| download | bcm5719-llvm-8013bd339b571ce36e2f8f20e40411b3c19446f8.tar.gz bcm5719-llvm-8013bd339b571ce36e2f8f20e40411b3c19446f8.zip | |
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(); }
llvm-svn: 45399
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/X86/fp-stack-ret-store.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/fp-stack-ret-store.ll b/llvm/test/CodeGen/X86/fp-stack-ret-store.ll new file mode 100644 index 00000000000..87829649a31 --- /dev/null +++ b/llvm/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(...) |
