[X86] Teach fast isel to use MOV32ri64 for loading an unsigned 32 immediate into a 64-bit register.
Previously we used SUBREG_TO_REG+MOV32ri. But regular isel was changed recently to use the MOV32ri64 pseudo. Fast isel now does the same.
llvm-svn: 342788
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index b9a40b5..888c43a 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -3744,7 +3744,7 @@
case MVT::i32: Opc = X86::MOV32ri; break;
case MVT::i64: {
if (isUInt<32>(Imm))
- Opc = X86::MOV32ri;
+ Opc = X86::MOV32ri64;
else if (isInt<32>(Imm))
Opc = X86::MOV64ri32;
else
@@ -3752,14 +3752,6 @@
break;
}
}
- if (VT == MVT::i64 && Opc == X86::MOV32ri) {
- unsigned SrcReg = fastEmitInst_i(Opc, &X86::GR32RegClass, Imm);
- unsigned ResultReg = createResultReg(&X86::GR64RegClass);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
- TII.get(TargetOpcode::SUBREG_TO_REG), ResultReg)
- .addImm(0).addReg(SrcReg).addImm(X86::sub_32bit);
- return ResultReg;
- }
return fastEmitInst_i(Opc, TLI.getRegClassFor(VT), Imm);
}