[mips] Use "or $r0, $r1, $zero" instead of "addu $r0, $zero, $r1" to copy
physical register $r1 to $r0.
GNU disassembler recognizes an "or" instruction as a "move", and this change
makes the disassembled code easier to read.
Original patch by Reed Kotler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170655 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsSEInstrInfo.cpp b/lib/Target/Mips/MipsSEInstrInfo.cpp
index a714411..cd8f9f4 100644
--- a/lib/Target/Mips/MipsSEInstrInfo.cpp
+++ b/lib/Target/Mips/MipsSEInstrInfo.cpp
@@ -90,7 +90,7 @@
if (Mips::CPURegsRegClass.contains(DestReg)) { // Copy to CPU Reg.
if (Mips::CPURegsRegClass.contains(SrcReg))
- Opc = Mips::ADDu, ZeroReg = Mips::ZERO;
+ Opc = Mips::OR, ZeroReg = Mips::ZERO;
else if (Mips::CCRRegClass.contains(SrcReg))
Opc = Mips::CFC1;
else if (Mips::FGR32RegClass.contains(SrcReg))
@@ -120,7 +120,7 @@
Opc = Mips::MOVCCRToCCR;
else if (Mips::CPU64RegsRegClass.contains(DestReg)) { // Copy to CPU64 Reg.
if (Mips::CPU64RegsRegClass.contains(SrcReg))
- Opc = Mips::DADDu, ZeroReg = Mips::ZERO_64;
+ Opc = Mips::OR64, ZeroReg = Mips::ZERO_64;
else if (SrcReg == Mips::HI64)
Opc = Mips::MFHI64, SrcReg = 0;
else if (SrcReg == Mips::LO64)
@@ -144,11 +144,11 @@
if (DestReg)
MIB.addReg(DestReg, RegState::Define);
- if (ZeroReg)
- MIB.addReg(ZeroReg);
-
if (SrcReg)
MIB.addReg(SrcReg, getKillRegState(KillSrc));
+
+ if (ZeroReg)
+ MIB.addReg(ZeroReg);
}
void MipsSEInstrInfo::