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Implement some simple IR optimizations (get/set eliminiation and DCE)

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MerryMage
2016-07-21 21:48:45 +01:00
parent 90d317b868
commit 5fbfc6c155
16 changed files with 544 additions and 300 deletions
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2
src/frontend/translate/translate_arm.cpp
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@@ -161,7 +161,7 @@ struct ArmTranslatorVisitor final {
u32 imm32 = ArmExpandImm(rotate, imm8);
// CMP<c> <Rn>, #<imm>
if (ConditionPassed(cond)) {
auto result = ir.AddWithCarry(ir.GetRegister(n), ir.Imm32(~imm32), ir.Imm1(true));
auto result = ir.SubWithCarry(ir.GetRegister(n), ir.Imm32(imm32), ir.Imm1(1));
ir.SetNFlag(ir.MostSignificantBit(result.result));
ir.SetZFlag(ir.IsZero(result.result));
ir.SetCFlag(result.carry);