suyu/dynarmic
26
1
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity

constant_propagation_pass: Fold SignExtend{Type}ToLong opcodes if possible

Browse source
This commit is contained in:
Lioncash 2018-10-05 18:14:56 -04:00 committed by MerryMage
parent 2da2cf9058
commit 43b2eb4688
1 changed files with 14 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
src/ir_opt/constant_propagation_pass.cpp
View file

@ -123,6 +123,15 @@ void FoldSignExtendXToWord(IR::Inst& inst) {
inst.ReplaceUsesWith(IR::Value{static_cast<u32>(value)});
}
void FoldSignExtendXToLong(IR::Inst& inst) {
if (!inst.AreAllArgsImmediates()) {
return;
}
const s64 value = inst.GetArg(0).GetImmediateAsS64();
inst.ReplaceUsesWith(IR::Value{static_cast<u64>(value)});
}
void FoldZeroExtendXToWord(IR::Inst& inst) {
if (!inst.AreAllArgsImmediates()) {
return;
@ -185,6 +194,11 @@ void ConstantPropagation(IR::Block& block) {
case IR::Opcode::SignExtendHalfToWord:
FoldSignExtendXToWord(inst);
break;
case IR::Opcode::SignExtendByteToLong:
case IR::Opcode::SignExtendHalfToLong:
case IR::Opcode::SignExtendWordToLong:
FoldSignExtendXToLong(inst);
break;
case IR::Opcode::ZeroExtendByteToWord:
case IR::Opcode::ZeroExtendHalfToWord:
FoldZeroExtendXToWord(inst);