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Set a higher value for maxStoresPerMemcpy in MipsISelLowering.cpp.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158414 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2012-06-13 19:33:32 +00:00
parent 2bd7e532b4
commit e193b32583
3 changed files with 36 additions and 0 deletions
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12
lib/Target/Mips/MipsISelLowering.cpp
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@ -303,6 +303,8 @@ MipsTargetLowering(MipsTargetMachine &TM)
setExceptionPointerRegister(IsN64 ? Mips::A0_64 : Mips::A0);
setExceptionSelectorRegister(IsN64 ? Mips::A1_64 : Mips::A1);
maxStoresPerMemcpy = 16;
}
bool MipsTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
@ -3455,6 +3457,16 @@ MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
return false;
}
EVT MipsTargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
unsigned SrcAlign, bool IsZeroVal,
bool MemcpyStrSrc,
MachineFunction &MF) const {
if (Subtarget->hasMips64())
return MVT::i64;
return MVT::i32;
}
bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
if (VT != MVT::f32 && VT != MVT::f64)
return false;

5
lib/Target/Mips/MipsISelLowering.h
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@ -195,6 +195,11 @@ namespace llvm {
virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
virtual EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
unsigned SrcAlign, bool IsZeroVal,
bool MemcpyStrSrc,
MachineFunction &MF) const;
/// isFPImmLegal - Returns true if the target can instruction select the
/// specified FP immediate natively. If false, the legalizer will
/// materialize the FP immediate as a load from a constant pool.

19
test/CodeGen/Mips/memcpy.ll Normal file
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@ -0,0 +1,19 @@
; RUN: llc -march=mipsel < %s | FileCheck %s
%struct.S1 = type { i32, [41 x i8] }
@.str = private unnamed_addr constant [31 x i8] c"abcdefghijklmnopqrstuvwxyzABCD\00", align 1
define void @foo1(%struct.S1* %s1, i8 signext %n) nounwind {
entry:
; CHECK-NOT: call16(memcpy
%arraydecay = getelementptr inbounds %struct.S1* %s1, i32 0, i32 1, i32 0
tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %arraydecay, i8* getelementptr inbounds ([31 x i8]* @.str, i32 0, i32 0), i32 31, i32 1, i1 false)
%arrayidx = getelementptr inbounds %struct.S1* %s1, i32 0, i32 1, i32 40
store i8 %n, i8* %arrayidx, align 1
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind