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| author | Reid Kleckner <rnk@google.com> | 2016-01-21 22:23:22 +0000 |
|---|---|---|
| committer | Reid Kleckner <rnk@google.com> | 2016-01-21 22:23:22 +0000 |
| commit | 18ec96f0fcf4bfc312518bd0d5fda98f795c7a09 (patch) | |
| tree | e3c5b161a3d5b1b282c5566c3d244dca7ef608c4 /llvm/test | |
| parent | bfc33d0f3a786682ec7672f955fbbec80a7bd341 (diff) | |
| download | bcm5719-llvm-18ec96f0fcf4bfc312518bd0d5fda98f795c7a09.tar.gz bcm5719-llvm-18ec96f0fcf4bfc312518bd0d5fda98f795c7a09.zip | |
Avoid unnecessary stack realignment in musttail thunks with SSE2 enabled
The X86 musttail implementation finds register parameters to forward by
running the calling convention algorithm until a non-register location
is returned. However, assigning a vector memory location has the side
effect of increasing the function's stack alignment. We shouldn't
increase the stack alignment when we are only looking for register
parameters, so this change conditionalizes it.
llvm-svn: 258442
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/X86/musttail-varargs.ll | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/musttail-varargs.ll b/llvm/test/CodeGen/X86/musttail-varargs.ll index 247d78776b8..db4a6f75d83 100644 --- a/llvm/test/CodeGen/X86/musttail-varargs.ll +++ b/llvm/test/CodeGen/X86/musttail-varargs.ll @@ -2,6 +2,7 @@ ; RUN: llc < %s -enable-tail-merge=0 -mtriple=x86_64-linux-gnux32 | FileCheck %s --check-prefix=LINUX-X32 ; RUN: llc < %s -enable-tail-merge=0 -mtriple=x86_64-windows | FileCheck %s --check-prefix=WINDOWS ; RUN: llc < %s -enable-tail-merge=0 -mtriple=i686-windows | FileCheck %s --check-prefix=X86 +; RUN: llc < %s -enable-tail-merge=0 -mtriple=i686-windows -mattr=+sse2 | FileCheck %s --check-prefix=X86 ; Test that we actually spill and reload all arguments in the variadic argument ; pack. Doing a normal call will clobber all argument registers, and we will @@ -136,6 +137,8 @@ define void @g_thunk(i8* %fptr_i8, ...) { ; WINDOWS: jmpq *%rcx # TAILCALL ; X86-LABEL: _g_thunk: +; X86-NOT: push %ebp +; X86-NOT: andl {{.*}}, %esp ; X86: jmpl *%eax # TAILCALL ; Do a simple multi-exit multi-bb test. |
