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-rw-r--r--llvm/lib/Target/ARM/ARMInstructionSelector.cpp4
-rw-r--r--llvm/lib/Target/ARM/ARMLegalizerInfo.cpp5
-rw-r--r--llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp1
3 files changed, 8 insertions, 2 deletions
diff --git a/llvm/lib/Target/ARM/ARMInstructionSelector.cpp b/llvm/lib/Target/ARM/ARMInstructionSelector.cpp
index 8d224d6a70f..9cd293755f2 100644
--- a/llvm/lib/Target/ARM/ARMInstructionSelector.cpp
+++ b/llvm/lib/Target/ARM/ARMInstructionSelector.cpp
@@ -299,6 +299,10 @@ bool ARMInstructionSelector::select(MachineInstr &I) const {
I.setDesc(TII.get(ARM::ADDrr));
MIB.add(predOps(ARMCC::AL)).add(condCodeOp());
break;
+ case G_SUB:
+ I.setDesc(TII.get(ARM::SUBrr));
+ MIB.add(predOps(ARMCC::AL)).add(condCodeOp());
+ break;
case G_FADD:
if (!selectFAdd(MIB, TII, MRI))
return false;
diff --git a/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp b/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp
index 994bbd673dd..4c568c023a3 100644
--- a/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMLegalizerInfo.cpp
@@ -43,8 +43,9 @@ ARMLegalizerInfo::ARMLegalizerInfo(const ARMSubtarget &ST) {
setAction({Op, 1, p0}, Legal);
}
- for (auto Ty : {s1, s8, s16, s32})
- setAction({G_ADD, Ty}, Legal);
+ for (unsigned Op : {G_ADD, G_SUB})
+ for (auto Ty : {s1, s8, s16, s32})
+ setAction({Op, Ty}, Legal);
for (unsigned Op : {G_SEXT, G_ZEXT}) {
setAction({Op, s32}, Legal);
diff --git a/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp b/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp
index 08f3da73886..dc0866f81df 100644
--- a/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp
@@ -219,6 +219,7 @@ ARMRegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
switch (Opc) {
case G_ADD:
+ case G_SUB:
case G_SEXT:
case G_ZEXT:
case G_GEP:
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