[llvm] r329147 - [X86] Remove dead code for handling i8/i16 UMUL_LOHI/SMUL_LOHI from X86ISelDAGToDAG.cpp. NFC
Craig Topper via llvm-commits
llvm-commits at lists.llvm.org
Tue Apr 3 21:38:55 PDT 2018
Author: ctopper
Date: Tue Apr 3 21:38:55 2018
New Revision: 329147
URL: http://llvm.org/viewvc/llvm-project?rev=329147&view=rev
Log:
[X86] Remove dead code for handling i8/i16 UMUL_LOHI/SMUL_LOHI from X86ISelDAGToDAG.cpp. NFC
These are promoted to i16/i32 multiplies by a DAG combine.
Modified:
llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp
Modified: llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp?rev=329147&r1=329146&r2=329147&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelDAGToDAG.cpp Tue Apr 3 21:38:55 2018
@@ -2816,8 +2816,6 @@ void X86DAGToDAGISel::Select(SDNode *Nod
if (!isSigned) {
switch (NVT.SimpleTy) {
default: llvm_unreachable("Unsupported VT!");
- case MVT::i8: Opc = X86::MUL8r; MOpc = X86::MUL8m; break;
- case MVT::i16: Opc = X86::MUL16r; MOpc = X86::MUL16m; break;
case MVT::i32: Opc = hasBMI2 ? X86::MULX32rr : X86::MUL32r;
MOpc = hasBMI2 ? X86::MULX32rm : X86::MUL32m; break;
case MVT::i64: Opc = hasBMI2 ? X86::MULX64rr : X86::MUL64r;
@@ -2826,8 +2824,6 @@ void X86DAGToDAGISel::Select(SDNode *Nod
} else {
switch (NVT.SimpleTy) {
default: llvm_unreachable("Unsupported VT!");
- case MVT::i8: Opc = X86::IMUL8r; MOpc = X86::IMUL8m; break;
- case MVT::i16: Opc = X86::IMUL16r; MOpc = X86::IMUL16m; break;
case MVT::i32: Opc = X86::IMUL32r; MOpc = X86::IMUL32m; break;
case MVT::i64: Opc = X86::IMUL64r; MOpc = X86::IMUL64m; break;
}
@@ -2836,14 +2832,6 @@ void X86DAGToDAGISel::Select(SDNode *Nod
unsigned SrcReg, LoReg, HiReg;
switch (Opc) {
default: llvm_unreachable("Unknown MUL opcode!");
- case X86::IMUL8r:
- case X86::MUL8r:
- SrcReg = LoReg = X86::AL; HiReg = X86::AH;
- break;
- case X86::IMUL16r:
- case X86::MUL16r:
- SrcReg = LoReg = X86::AX; HiReg = X86::DX;
- break;
case X86::IMUL32r:
case X86::MUL32r:
SrcReg = LoReg = X86::EAX; HiReg = X86::EDX;
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