[llvm-commits] [llvm] r147888 - in /llvm/trunk: lib/Target/X86/X86Subtarget.cpp test/CodeGen/X86/stack-align2.ll

[Joerg Sonnenberger]

Author: joerg
Date: Tue Jan 10 16:43:53 2012
New Revision: 147888

URL: http://llvm.org/viewvc/llvm-project?rev=147888&view=rev
Log:
Default stack alignment for 32bit x86 should be 4 Bytes, not 8 Bytes.
Add a test that checks the stack alignment of a simple function for
Darwin, Linux and NetBSD for 32bit and 64bit mode.

Added:
    llvm/trunk/test/CodeGen/X86/stack-align2.ll
Modified:
    llvm/trunk/lib/Target/X86/X86Subtarget.cpp

Modified: llvm/trunk/lib/Target/X86/X86Subtarget.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.cpp?rev=147888&r1=147887&r2=147888&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.cpp Tue Jan 10 16:43:53 2012
@@ -333,7 +333,7 @@
   , IsUAMemFast(false)
   , HasVectorUAMem(false)
   , HasCmpxchg16b(false)
-  , stackAlignment(8)
+  , stackAlignment(4)
   // FIXME: this is a known good value for Yonah. How about others?
   , MaxInlineSizeThreshold(128)
   , TargetTriple(TT)

Added: llvm/trunk/test/CodeGen/X86/stack-align2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/stack-align2.ll?rev=147888&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/stack-align2.ll (added)
+++ llvm/trunk/test/CodeGen/X86/stack-align2.ll Tue Jan 10 16:43:53 2012
@@ -0,0 +1,25 @@
+; RUN: llc < %s -mtriple=i386-linux | FileCheck %s -check-prefix=LINUX-I386
+; RUN: llc < %s -mtriple=i386-netbsd | FileCheck %s -check-prefix=NETBSD-I386
+; RUN: llc < %s -mtriple=i686-apple-darwin8 | FileCheck %s -check-prefix=DARWIN-I386
+; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s -check-prefix=LINUX-X86_64
+; RUN: llc < %s -mtriple=x86_64-netbsd | FileCheck %s -check-prefix=NETBSD-X86_64
+; RUN: llc < %s -mtriple=x86_64-apple-darwin8 | FileCheck %s -check-prefix=DARWIN-X86_64
+
+define i32 @test() nounwind {
+entry:
+  call void @test2()
+  ret i32 0
+
+; LINUX-I386:     subl	$12, %esp
+; DARWIN-I386:    subl	$12, %esp
+; NETBSD-I386-NOT: subl	{{.*}}, %esp
+
+; LINUX-X86_64:      pushq %{{.*}}
+; LINUX-X86_64-NOT:  subq	{{.*}}, %rsp
+; DARWIN-X86_64:     pushq %{{.*}}
+; DARWIN-X86_64-NOT: subq	{{.*}}, %rsp
+; NETBSD-X86_64:     pushq %{{.*}}
+; NETBSD-X86_64-NOT: subq	{{.*}}, %rsp
+}
+
+declare void @test2()