[MIPS GlobalISel] Select G_UADDO
Lower G_UADDO.
Legalize G_UADDO for MIPS32
Differential Revision: https://reviews.llvm.org/D58671
llvm-svn: 354900
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 7abce5a..67f90cd 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -1545,6 +1545,18 @@
case TargetOpcode::G_CTTZ:
case TargetOpcode::G_CTPOP:
return lowerBitCount(MI, TypeIdx, Ty);
+ case G_UADDO: {
+ unsigned Res = MI.getOperand(0).getReg();
+ unsigned CarryOut = MI.getOperand(1).getReg();
+ unsigned LHS = MI.getOperand(2).getReg();
+ unsigned RHS = MI.getOperand(3).getReg();
+
+ MIRBuilder.buildAdd(Res, LHS, RHS);
+ MIRBuilder.buildICmp(CmpInst::ICMP_ULT, CarryOut, Res, RHS);
+
+ MI.eraseFromParent();
+ return Legalized;
+ }
case G_UADDE: {
unsigned Res = MI.getOperand(0).getReg();
unsigned CarryOut = MI.getOperand(1).getReg();