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EmitC: Allow casts between opaque and float types #428

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Merged
TinaAMD merged 3 commits into from
Dec 17, 2024
Merged

EmitC: Allow casts between opaque and float types #428

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8a7b927
EmitC: Allow casts between opaque and float types
TinaAMD Dec 16, 2024
96d2f92
Use EmitC cast compatibility check
TinaAMD Dec 16, 2024
3a6675a
Allow opaque types in casts (also for array types)
TinaAMD Dec 16, 2024
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4 changes: 2 additions & 2 deletions mlir/lib/Conversion/ArithToEmitC/ArithToEmitC.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -757,7 +757,7 @@ class TruncFConversion : public OpConversionPattern<arith::TruncFOp> {
return rewriter.notifyMatchFailure(castOp,
"unsupported cast destination type");

if (!castOp.areCastCompatible(operandType, dstType))
if (!emitc::CastOp::areCastCompatible(operandType, dstType))
return rewriter.notifyMatchFailure(castOp, "cast-incompatible types");

rewriter.replaceOpWithNewOp<emitc::CastOp>(castOp, dstType,
Expand Down Expand Up @@ -787,7 +787,7 @@ class ExtFConversion : public OpConversionPattern<arith::ExtFOp> {
return rewriter.notifyMatchFailure(castOp,
"unsupported cast destination type");

if (!castOp.areCastCompatible(operandType, dstType))
if (!emitc::CastOp::areCastCompatible(operandType, dstType))
return rewriter.notifyMatchFailure(castOp, "cast-incompatible types");

rewriter.replaceOpWithNewOp<emitc::CastOp>(castOp, dstType,
Expand Down
4 changes: 4 additions & 0 deletions mlir/lib/Dialect/EmitC/IR/EmitC.cpp
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Expand Up @@ -313,6 +313,10 @@ LogicalResult emitc::AssignOp::verify() {
bool CastOp::areCastCompatible(TypeRange inputs, TypeRange outputs) {
Type input = inputs.front(), output = outputs.front();

// Opaque types are always allowed
if (isa<emitc::OpaqueType>(input) || isa<emitc::OpaqueType>(output))
return true;

// Cast to array is only possible from an array
if (isa<emitc::ArrayType>(input) != isa<emitc::ArrayType>(output))
return false;
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4 changes: 4 additions & 0 deletions mlir/test/Dialect/EmitC/ops.mlir
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Expand Up @@ -36,11 +36,15 @@ emitc.func private @extern(i32) attributes {specifiers = ["extern"]}

func.func @cast(%arg0: i32) {
%1 = emitc.cast %arg0: i32 to f32
%2 = emitc.cast %1: f32 to !emitc.opaque<"some type">
%3 = emitc.cast %2: !emitc.opaque<"some type"> to !emitc.size_t
return
}

func.func @cast_array(%arg : !emitc.array<4xf32>) {
%1 = emitc.cast %arg: !emitc.array<4xf32> to !emitc.array<4xf32> ref
%2 = emitc.cast %arg: !emitc.array<4xf32> to !emitc.opaque<"some type">
%3 = emitc.cast %2: !emitc.opaque<"some type"> to !emitc.array<4xf32> ref
return
}

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