diff options
| author | Jack Andersen <jackoalan@gmail.com> | 2021-12-05 14:55:20 -0500 |
|---|---|---|
| committer | Jack Andersen <jackoalan@gmail.com> | 2021-12-05 15:55:59 -0500 |
| commit | f108c7f59dfae5fafbb00fbdef7a0cd31826dcfc (patch) | |
| tree | aa88062fe53569e594ed7e536ccb3f80736c5f80 /llvm/lib/CodeGen/MachineFunction.cpp | |
| parent | 1b44364714981017302f182583a43fda4d28e0eb (diff) | |
| download | llvm-f108c7f59dfae5fafbb00fbdef7a0cd31826dcfc.zip llvm-f108c7f59dfae5fafbb00fbdef7a0cd31826dcfc.tar.gz llvm-f108c7f59dfae5fafbb00fbdef7a0cd31826dcfc.tar.bz2 | |
[GlobalISel] Allow DBG_VALUE to use undefined vregs before LiveDebugValues.
Expanding on D109750.
Since `DBG_VALUE` instructions have final register validity determined in
`LDVImpl::handleDebugValue`, there is no apparent reason to immediately prune
unused register operands as their defs are erased. Consequently, this renders
`MachineInstr::eraseFromParentAndMarkDBGValuesForRemoval` moot; gaining a
substantial performance improvement.
The only necessary changes involve making relevant passes consider invalid
DBG_VALUE vregs uses as valid.
Reviewed By: MatzeB
Differential Revision: https://reviews.llvm.org/D112852
Diffstat (limited to 'llvm/lib/CodeGen/MachineFunction.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineFunction.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp index ff3a39e..b6f1a6e 100644 --- a/llvm/lib/CodeGen/MachineFunction.cpp +++ b/llvm/lib/CodeGen/MachineFunction.cpp @@ -89,6 +89,7 @@ static cl::opt<unsigned> AlignAllFunctions( static const char *getPropertyName(MachineFunctionProperties::Property Prop) { using P = MachineFunctionProperties::Property; + // clang-format off switch(Prop) { case P::FailedISel: return "FailedISel"; case P::IsSSA: return "IsSSA"; @@ -100,7 +101,9 @@ static const char *getPropertyName(MachineFunctionProperties::Property Prop) { case P::TracksLiveness: return "TracksLiveness"; case P::TiedOpsRewritten: return "TiedOpsRewritten"; case P::FailsVerification: return "FailsVerification"; + case P::TracksDebugUserValues: return "TracksDebugUserValues"; } + // clang-format on llvm_unreachable("Invalid machine function property"); } |