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| author | Vedant Kumar <vsk@apple.com> | 2020-04-13 16:15:37 -0700 |
|---|---|---|
| committer | Vedant Kumar <vsk@apple.com> | 2020-04-22 17:03:39 -0700 |
| commit | 2a5675f11d3bc803a245c0e2a3b47491c8f8a065 (patch) | |
| tree | c23de1280f407f61fc4960e858ea272036114971 /llvm/lib/CodeGen/MachineBasicBlock.cpp | |
| parent | b424b0bf731d1fb338180553a86f912746f640ad (diff) | |
| download | llvm-2a5675f11d3bc803a245c0e2a3b47491c8f8a065.zip llvm-2a5675f11d3bc803a245c0e2a3b47491c8f8a065.tar.gz llvm-2a5675f11d3bc803a245c0e2a3b47491c8f8a065.tar.bz2 | |
[MachineDebugify] Insert synthetic DBG_VALUE instructions
Summary:
Teach MachineDebugify how to insert DBG_VALUE instructions. This can
help find bugs causing CodeGen differences when debug info is present.
DBG_VALUE instructions are only emitted when -debugify-level is set to
locations+variables.
There is essentially no attempt made to match up DBG_VALUE register
operands with the local variables they ought to correspond to. I'm not
sure how to improve the situation. In some cases (MachineMemOperand?)
it's possible to find the IR instruction a MachineInstr corresponds to,
but in general this seems to call for "undoing" the work done by ISel.
Reviewers: dsanders, aprantl
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D78135
Diffstat (limited to 'llvm/lib/CodeGen/MachineBasicBlock.cpp')
0 files changed, 0 insertions, 0 deletions