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CodeGen: correct memset emittance for WoA

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Windows on ARM does not conform to AEABI.  However, memset would be emitted
using the AEABI signature, resulting in inverted parameters.  Handle this
special case appropriately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207943 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool 2014-05-04 23:13:21 +00:00
parent 4fc5273a49
commit 8d538f1122
2 changed files with 20 additions and 1 deletions
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3
lib/Target/ARM/ARMSelectionDAGInfo.cpp
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@ -151,7 +151,8 @@ EmitTargetCodeForMemset(SelectionDAG &DAG, SDLoc dl,
unsigned Align, bool isVolatile,
MachinePointerInfo DstPtrInfo) const {
// Use default for non-AAPCS (or MachO) subtargets
if (!Subtarget->isAAPCS_ABI() || Subtarget->isTargetMachO())
if (!Subtarget->isAAPCS_ABI() || Subtarget->isTargetMachO() ||
Subtarget->isTargetWindows())
return SDValue();
const ARMTargetLowering &TLI =

18
test/CodeGen/ARM/Windows/memset.ll Normal file
View File

@ -0,0 +1,18 @@
; RUN: llc -mtriple thumbv7--windows-itanium -filetype asm -o - %s | FileCheck %s
@source = common global [512 x i8] zeroinitializer, align 4
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
define void @function() {
entry:
call void @llvm.memset.p0i8.i32(i8* bitcast ([512 x i8]* @source to i8*), i8 0, i32 512, i32 0, i1 false)
unreachable
}
; CHECK: movs r1, #0
; CHECK: mov.w r2, #512
; CHECK: movw r0, :lower16:source
; CHECK: movt r0, :upper16:source
; CHECK: memset