2cff995e91
When spill slots are eliminated (VGPR-to-AGPR, SGPR-to-VGPR lanes), debug values referencing these frame indices were not always properly cleaned up. This caused an assertion failure in getObjectOffset() when PrologEpilogInserter tried to access the offset of a dead frame object. The existing debug fixup code in SIFrameLowering and SILowerSGPRSpills had two limitations: 1. It only checked one operand position, but DBG_VALUE_LIST instructions can have multiple debug operands with frame indices. 2. It didn't handle all types of dead frame indices uniformly. Fix by centralizing debug info cleanup in removeDeadFrameIndices(), which already knows all frame indices being removed. This iterates over all debug operands using MI.debug_operands(). Assisted-by: Claude Code.
26 lines
883 B
C++
26 lines
883 B
C++
//===- SISpillUtils.h - SI spill helper functions ---------------*- C++ -*-===//
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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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#ifndef LLVM_LIB_TARGET_AMDGPU_SISPILLUTILS_H
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#define LLVM_LIB_TARGET_AMDGPU_SISPILLUTILS_H
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namespace llvm {
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class BitVector;
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class MachineBasicBlock;
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class MachineFrameInfo;
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/// Replace frame index operands with null registers in debug value instructions
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/// for the specified spill frame indices.
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void clearDebugInfoForSpillFIs(MachineFrameInfo &MFI, MachineBasicBlock &MBB,
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const BitVector &SpillFIs);
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_AMDGPU_SISPILLUTILS_H
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