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Fold constant offsets and group constant addresses (#2285)

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* Fold constant offsets and group constant addresses

* PPTC version bump
This commit is contained in:
gdkchan 2021-05-13 16:26:57 -03:00 • committed by GitHub
parent 57ea3f93a3
commit e318022b89
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3 changed files with 42 additions and 21 deletions
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42
ARMeilleure/CodeGen/X86/X86Optimizer.cs
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@ -1,6 +1,7 @@
using ARMeilleure.CodeGen.Optimizations;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Translation;
using System.Collections.Generic;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
using static ARMeilleure.IntermediateRepresentation.OperationHelper;
@ -11,8 +12,28 @@ namespace ARMeilleure.CodeGen.X86
{
public static void RunPass(ControlFlowGraph cfg)
{
var constants = new Dictionary<ulong, Operand>();
Operand GetConstantCopy(BasicBlock block, Operation operation, Operand source)
{
if (!constants.TryGetValue(source.Value, out var constant))
{
constant = Local(source.Type);
Operation copyOp = Operation(Instruction.Copy, constant, source);
block.Operations.AddBefore(operation, copyOp);
constants.Add(source.Value, constant);
}
return constant;
}
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
constants.Clear();
Node nextNode;
for (Node node = block.Operations.First; node != null; node = nextNode)
@ -33,24 +54,12 @@ namespace ARMeilleure.CodeGen.X86
if (src1.Kind == OperandKind.Constant && (src1.Relocatable || CodeGenCommon.IsLongConst(src1)))
{
Operand temp = Local(src1.Type);
Operation copyOp = Operation(Instruction.Copy, temp, src1);
block.Operations.AddBefore(operation, copyOp);
operation.SetSource(0, temp);
operation.SetSource(0, GetConstantCopy(block, operation, src1));
}
if (src2.Kind == OperandKind.Constant && (src2.Relocatable || CodeGenCommon.IsLongConst(src2)))
{
Operand temp = Local(src2.Type);
Operation copyOp = Operation(Instruction.Copy, temp, src2);
block.Operations.AddBefore(operation, copyOp);
operation.SetSource(1, temp);
operation.SetSource(1, GetConstantCopy(block, operation, src2));
}
}
@ -111,6 +120,11 @@ namespace ARMeilleure.CodeGen.X86
return null;
}
if (imm == 0 && scale == Multiplier.x1 && indexOp != null)
{
imm = GetConstOp(ref indexOp);
}
return MemoryOp(type, baseOp, indexOp, scale, imm);
}