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Fix PR13899 

- Update maximal stack alignment when stack arguments are prepared before a
  call.
- Test cases are enhanced to show it's not a Win32 specific issue but a generic
  one.

llvm-svn: 164946
This commit is contained in:
Michael Liao 2012-10-01 16:44:04 +00:00
parent 4c8af550ad
commit d756f06063
2 changed files with 60 additions and 0 deletions
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2
llvm/include/llvm/CodeGen/CallingConvLower.h
View File

@ -17,6 +17,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/Target/TargetCallingConv.h"
#include "llvm/CallingConv.h"
@ -288,6 +289,7 @@ public:
StackOffset = ((StackOffset + Align-1) & ~(Align-1));
unsigned Result = StackOffset;
StackOffset += Size;
MF.getFrameInfo()->ensureMaxAlignment(Align);
return Result;
}

58
llvm/test/CodeGen/X86/pr13899.ll Normal file
View File

@ -0,0 +1,58 @@
; RUN: llc < %s -mtriple=i386-pc-win32 -mcpu=corei7 | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=core-avx2 | FileCheck %s --check-prefix=X64
; ModuleID = 'a.bc'
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S32"
target triple = "i386-pc-win32"
%v4_varying_big_struct = type { [4 x <4 x i32>] }
declare <4 x i32> @"foo"(%v4_varying_big_struct, <4 x i32>) nounwind
define <4 x i32> @"bar"(%v4_varying_big_struct %s, <4 x i32> %__mask) nounwind {
allocas:
%calltmp = call <4 x i32> @"foo"(%v4_varying_big_struct %s, <4 x i32> %__mask)
ret <4 x i32> %calltmp
; CHECK: bar
; CHECK: andl
; CHECK: call
; CHECK: ret
}
declare <8 x float> @bar64(<8 x float> %i0, <8 x float> %i1,
<8 x float> %i2, <8 x float> %i3,
<8 x float> %i4, <8 x float> %i5,
<8 x float> %i6, <8 x float> %i7,
<8 x float> %i8, <8 x float> %i9)
define <8 x float> @foo64(<8 x float>* %p) {
%1 = load <8 x float>* %p
%idx1 = getelementptr inbounds <8 x float>* %p, i64 1
%2 = load <8 x float>* %idx1
%idx2 = getelementptr inbounds <8 x float>* %p, i64 2
%3 = load <8 x float>* %idx2
%idx3 = getelementptr inbounds <8 x float>* %p, i64 3
%4 = load <8 x float>* %idx3
%idx4 = getelementptr inbounds <8 x float>* %p, i64 4
%5 = load <8 x float>* %idx4
%idx5 = getelementptr inbounds <8 x float>* %p, i64 5
%6 = load <8 x float>* %idx5
%idx6 = getelementptr inbounds <8 x float>* %p, i64 6
%7 = load <8 x float>* %idx6
%idx7 = getelementptr inbounds <8 x float>* %p, i64 7
%8 = load <8 x float>* %idx7
%idx8 = getelementptr inbounds <8 x float>* %p, i64 8
%9 = load <8 x float>* %idx8
%idx9 = getelementptr inbounds <8 x float>* %p, i64 9
%10 = load <8 x float>* %idx9
%r = tail call <8 x float> @bar64(<8 x float> %1, <8 x float> %2,
<8 x float> %3, <8 x float> %4,
<8 x float> %5, <8 x float> %6,
<8 x float> %7, <8 x float> %8,
<8 x float> %9, <8 x float> %10)
ret <8 x float> %r
; X64: foo
; X64: and
; X64: call
; X64: ret
}