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Make sure short memsets on ARM lower to stores, even when optimizing for size.

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llvm-svn: 143055
This commit is contained in:
Lang Hames 2011-10-26 20:56:52 +00:00
parent 5c8fa99c32
commit d87e366c7f
2 changed files with 20 additions and 0 deletions
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2
lib/Target/ARM/ARMISelLowering.cpp
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@ -752,6 +752,8 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
//// temporary - rewrite interface to use type
maxStoresPerMemcpy = maxStoresPerMemcpyOptSize = 1;
maxStoresPerMemset = 16;
maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
// On ARM arguments smaller than 4 bytes are extended, so all arguments
// are at least 4 bytes aligned.

18
test/CodeGen/ARM/2011-10-26-memset-inline.ll Normal file
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@ -0,0 +1,18 @@
; Make sure short memsets on ARM lower to stores, even when optimizing for size.
; RUN: llc -march=arm < %s | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
target triple = "thumbv7-apple-ios5.0.0"
; CHECK: strb
; CHECK-NEXT: strb
; CHECK-NEXT: strb
; CHECK-NEXT: strb
; CHECK-NEXT: strb
define void @foo(i8* nocapture %c) nounwind optsize {
entry:
call void @llvm.memset.p0i8.i64(i8* %c, i8 -1, i64 5, i32 1, i1 false)
ret void
}
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind