ae35188f97
The following changes are necessasy to get the generated tree
matcher to compile:
- In CodeExpansions::declare(), the assert() prevents connecting
two instructions. E.g. the match code
(match (MUL $t, $s1, $s2),
(SUB $d, $t, $s3)),
results in two declarations of $t, one for the def and one for
the use. Removing the assertion allows this construct.
If $t is later used, it is one of the operands, which should be
perfectly fine.
- The code emitted in GIMatchTreeVRegDefPartitioner::generatePartitionSelectorCode()
is not compilable:
- The value of NewInstrID should be emitted, not the name
- Both calls involving getOperand() end with one parenthesis too many
- Swaps generated condition for the partition code in the latter function
It also changes the rules i2p_to_p2i, fabs_fabs_fold, and fneg_fneg_fold
to use the tree matcher for a linear match. These rules are tested by:
CodeGen/AArch64/GlobalISel/combine-fabs.mir
CodeGen/AArch64/GlobalISel/combine-fneg.mir
CodeGen/AArch64/GlobalISel/combine-ptrtoint.mir
CodeGen/AMDGPU/GlobalISel/combine-add-nullptr.mir
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D133257
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
//===- CodeExpansions.h - Record expansions for CodeExpander --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file Record the expansions to use in a CodeExpander.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringMap.h"
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#ifndef LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
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#define LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
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namespace llvm {
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class CodeExpansions {
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public:
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using const_iterator = StringMap<std::string>::const_iterator;
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protected:
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StringMap<std::string> Expansions;
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public:
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void declare(StringRef Name, StringRef Expansion) {
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// Duplicates are not inserted. The expansion refers to different
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// MachineOperands using the same virtual register.
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Expansions.try_emplace(Name, Expansion);
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}
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std::string lookup(StringRef Variable) const {
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return Expansions.lookup(Variable);
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}
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const_iterator begin() const { return Expansions.begin(); }
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const_iterator end() const { return Expansions.end(); }
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const_iterator find(StringRef Variable) const {
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return Expansions.find(Variable);
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}
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};
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} // end namespace llvm
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#endif // ifndef LLVM_UTILS_TABLEGEN_CODEEXPANSIONS_H
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