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[CIR] Implement folder for VecExtractOp #139304

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Merged
merged 2 commits into from
May 13, 2025
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[CIR] Implement folder for VecExtractOp #139304

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6a21dc2
[CIR] Implement foldder for VecExtractOp
AmrDeveloper May 9, 2025
3d0b459
Check for index out of bounds
AmrDeveloper May 9, 2025
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2 changes: 2 additions & 0 deletions clang/include/clang/CIR/Dialect/IR/CIROps.td
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Original file line number Diff line number Diff line change
Expand Up @@ -1995,6 +1995,8 @@ def VecExtractOp : CIR_Op<"vec.extract", [Pure,
let assemblyFormat = [{
$vec `[` $index `:` type($index) `]` attr-dict `:` qualified(type($vec))
}];

let hasFolder = 1;
}

#endif // CLANG_CIR_DIALECT_IR_CIROPS_TD
20 changes: 20 additions & 0 deletions clang/lib/CIR/Dialect/IR/CIRDialect.cpp
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Expand Up @@ -1395,6 +1395,26 @@ LogicalResult cir::VecCreateOp::verify() {
return success();
}

//===----------------------------------------------------------------------===//
// VecExtractOp
//===----------------------------------------------------------------------===//

OpFoldResult cir::VecExtractOp::fold(FoldAdaptor adaptor) {
const auto vectorAttr =
llvm::dyn_cast_if_present<cir::ConstVectorAttr>(adaptor.getVec());
if (!vectorAttr)
return {};

const auto indexAttr =
llvm::dyn_cast_if_present<cir::IntAttr>(adaptor.getIndex());
if (!indexAttr)
return {};

const mlir::ArrayAttr elements = vectorAttr.getElts();
const int64_t index = indexAttr.getSInt();
return elements[index];
}

//===----------------------------------------------------------------------===//
// TableGen'd op method definitions
//===----------------------------------------------------------------------===//
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5 changes: 3 additions & 2 deletions clang/lib/CIR/Dialect/Transforms/CIRCanonicalize.cpp
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Expand Up @@ -125,9 +125,10 @@ void CIRCanonicalizePass::runOnOperation() {
assert(!cir::MissingFeatures::complexRealOp());
assert(!cir::MissingFeatures::complexImagOp());
assert(!cir::MissingFeatures::callOp());
// CastOp and UnaryOp are here to perform a manual `fold` in
// CastOp, UnaryOp and VecExtractOp are here to perform a manual `fold` in
// applyOpPatternsGreedily.
if (isa<BrOp, BrCondOp, CastOp, ScopeOp, SelectOp, UnaryOp>(op))
if (isa<BrOp, BrCondOp, CastOp, ScopeOp, SelectOp, UnaryOp, VecExtractOp>(
op))
ops.push_back(op);
});

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20 changes: 20 additions & 0 deletions clang/test/CIR/Transforms/vector-extract-fold.cir
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@@ -0,0 +1,20 @@
// RUN: cir-opt %s -cir-canonicalize -o - | FileCheck %s

!s32i = !cir.int<s, 32>

module {
cir.func @fold_extract_vector_op_test() {
%init = cir.alloca !s32i, !cir.ptr<!s32i>, ["e", init]
%const_vec = cir.const #cir.const_vector<[#cir.int<1> : !s32i, #cir.int<2> : !s32i, #cir.int<3> : !s32i, #cir.int<4> : !s32i]> : !cir.vector<4 x !s32i>
%index = cir.const #cir.int<1> : !s32i
%ele = cir.vec.extract %const_vec[%index : !s32i] : !cir.vector<4 x !s32i>
cir.store %ele, %init : !s32i, !cir.ptr<!s32i>
cir.return
}

// CHECK: %[[INIT:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["e", init]
// CHECK: %[[VALUE:.*]] = cir.const #cir.int<2> : !s32i
// CHECK: cir.store %[[VALUE]], %[[INIT]] : !s32i, !cir.ptr<!s32i>
}