derek.holloway
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20 lines
1.1 KiB
MLIR
20 lines
1.1 KiB
MLIR
// RUN: mlir-translate -mlir-to-llvmir %s | FileCheck %s
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// Per-element string globals referenced by the array-of-pointers global below.
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llvm.mlir.global private constant @s0("a\00") {addr_space = 0 : i32} : !llvm.array<2 x i8>
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llvm.mlir.global private constant @s1("b\00") {addr_space = 0 : i32} : !llvm.array<2 x i8>
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llvm.mlir.global private constant @s2("c\00") {addr_space = 0 : i32} : !llvm.array<2 x i8>
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// Single llvm.mlir.constant with a FlatSymbolRefAttr leaf per array element,
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// emitted inside the global's initializer region. This shape lets MLIR's
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// translator route the lowering through llvm::ConstantArray::get once
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// (the existing array-of-ArrayAttr path in getLLVMConstant), avoiding the
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// O(N^2) per-element ConstantFoldInsertValueInstruction blowup that a chain
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// of llvm.insertvalue ops would otherwise force on large arrays.
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llvm.mlir.global external constant @ptrs() : !llvm.array<3 x ptr> {
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%0 = llvm.mlir.constant([@s0, @s1, @s2]) : !llvm.array<3 x ptr>
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llvm.return %0 : !llvm.array<3 x ptr>
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}
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// CHECK: @ptrs = constant [3 x ptr] [ptr @s0, ptr @s1, ptr @s2]
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