2adcf1b25d
The custom DCE in cg-rewrite is meant to get rid of fir.shape, fir.shift, fir.shape_shift and fir.slice ops as well as their unused operands before codegen (that does not lower those abstract operation to LLVM). However, it turned out to be flowed in case some fir.shape operands were unused outside of fir.shape and appeared several times as operands: they were erased at the first appearance, causing the further attemp to erase it to segfault (since the op IR storage was deallocated). Instead of trying to fixing the custom DCE code, use mlir::runRegionDCE. Differential Revision: https://reviews.llvm.org/D143247
31 lines
1.3 KiB
Plaintext
31 lines
1.3 KiB
Plaintext
// Test rewrite of fir.declare. The result is replaced by the memref operand.
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// RUN: fir-opt --cg-rewrite %s -o - | FileCheck %s
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func.func @test(%arg0: !fir.ref<!fir.array<12x23xi32>>) {
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%c-1 = arith.constant -1 : index
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%c12 = arith.constant 12 : index
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%c-2 = arith.constant -2 : index
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%c23 = arith.constant 23 : index
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%0 = fir.shape_shift %c12, %c-1, %c23, %c-2 : (index, index, index, index) -> !fir.shapeshift<2>
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%1 = fir.declare %arg0(%0) {uniq_name = "_QFarray_numeric_lboundsEx"} : (!fir.ref<!fir.array<12x23xi32>>, !fir.shapeshift<2>) -> !fir.ref<!fir.array<12x23xi32>>
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fir.call @bar(%1) : (!fir.ref<!fir.array<12x23xi32>>) -> ()
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return
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}
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func.func private @bar(%arg0: !fir.ref<!fir.array<12x23xi32>>)
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// CHECK-LABEL: func.func @test(
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// CHECK-SAME: %[[arg0:.*]]: !fir.ref<!fir.array<12x23xi32>>) {
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// CHECK-NEXT: fir.call @bar(%[[arg0]]) : (!fir.ref<!fir.array<12x23xi32>>) -> ()
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func.func @useless_shape_with_duplicate_extent_operand(%arg0: !fir.ref<!fir.array<3x3xf32>>) {
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%c3 = arith.constant 3 : index
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%1 = fir.shape %c3, %c3 : (index, index) -> !fir.shape<2>
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%2 = fir.declare %arg0(%1) {uniq_name = "u"} : (!fir.ref<!fir.array<3x3xf32>>, !fir.shape<2>) -> !fir.ref<!fir.array<3x3xf32>>
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return
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}
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// CHECK-LABEL: func.func @useless_shape_with_duplicate_extent_operand(
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// CHECK-NEXT: return
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