[PATCH] D80604: [MachineCombiner] add a hook to allow some extension for resource length - NFC
ChenZheng via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue May 26 20:11:20 PDT 2020
shchenz updated this revision to Diff 266404.
shchenz added a comment.
debug message handling
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D80604/new/
https://reviews.llvm.org/D80604
Files:
llvm/include/llvm/CodeGen/TargetInstrInfo.h
llvm/lib/CodeGen/MachineCombiner.cpp
Index: llvm/lib/CodeGen/MachineCombiner.cpp
===================================================================
--- llvm/lib/CodeGen/MachineCombiner.cpp
+++ llvm/lib/CodeGen/MachineCombiner.cpp
@@ -406,12 +406,14 @@
<< ResLenBeforeCombine
<< " and after: " << ResLenAfterCombine << "\n";);
LLVM_DEBUG(
- ResLenAfterCombine <= ResLenBeforeCombine
+ ResLenAfterCombine <=
+ ResLenBeforeCombine + TII->getExtendResourceLenLimit()
? dbgs() << "\t\t As result it IMPROVES/PRESERVES Resource Length\n"
: dbgs() << "\t\t As result it DOES NOT improve/preserve Resource "
"Length\n");
- return ResLenAfterCombine <= ResLenBeforeCombine;
+ return ResLenAfterCombine <=
+ ResLenBeforeCombine + TII->getExtendResourceLenLimit();
}
/// \returns true when new instruction sequence should be generated
Index: llvm/include/llvm/CodeGen/TargetInstrInfo.h
===================================================================
--- llvm/include/llvm/CodeGen/TargetInstrInfo.h
+++ llvm/include/llvm/CodeGen/TargetInstrInfo.h
@@ -1095,6 +1095,9 @@
SmallVectorImpl<MachineInstr *> &DelInstrs,
DenseMap<unsigned, unsigned> &InstrIdxForVirtReg) const;
+ /// The limit on resource length extension we accept in MachineCombiner Pass.
+ virtual int16_t getExtendResourceLenLimit() const { return 0; }
+
/// This is an architecture-specific helper function of reassociateOps.
/// Set special operand attributes for new instructions after reassociation.
virtual void setSpecialOperandAttr(MachineInstr &OldMI1, MachineInstr &OldMI2,
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