[llvm-commits] [llvm] r143055 - in /llvm/trunk: lib/Target/ARM/ARMISelLowering.cpp test/CodeGen/ARM/2011-10-26-memset-inline.ll

[Lang Hames]

Author: lhames
Date: Wed Oct 26 15:56:52 2011
New Revision: 143055

URL: http://llvm.org/viewvc/llvm-project?rev=143055&view=rev
Log:
Make sure short memsets on ARM lower to stores, even when optimizing for size.

Added:
    llvm/trunk/test/CodeGen/ARM/2011-10-26-memset-inline.ll
Modified:
    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=143055&r1=143054&r2=143055&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Wed Oct 26 15:56:52 2011
@@ -752,6 +752,8 @@
 
   //// 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.

Added: llvm/trunk/test/CodeGen/ARM/2011-10-26-memset-inline.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/2011-10-26-memset-inline.ll?rev=143055&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/2011-10-26-memset-inline.ll (added)
+++ llvm/trunk/test/CodeGen/ARM/2011-10-26-memset-inline.ll Wed Oct 26 15:56:52 2011
@@ -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