[llvm] 47656dc - [X86] Avoid repeated hash lookups (NFC) (#128464)
via llvm-commits
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Mon Feb 24 01:00:10 PST 2025
Author: Kazu Hirata
Date: 2025-02-24T01:00:05-08:00
New Revision: 47656dc765aabed8079c650261a79a7e85c4370c
URL: https://github.com/llvm/llvm-project/commit/47656dc765aabed8079c650261a79a7e85c4370c
DIFF: https://github.com/llvm/llvm-project/commit/47656dc765aabed8079c650261a79a7e85c4370c.diff
LOG: [X86] Avoid repeated hash lookups (NFC) (#128464)
Added:
Modified:
llvm/lib/Target/X86/X86FastPreTileConfig.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/X86/X86FastPreTileConfig.cpp b/llvm/lib/Target/X86/X86FastPreTileConfig.cpp
index 4486a1cae782c..d3c239250943e 100644
--- a/llvm/lib/Target/X86/X86FastPreTileConfig.cpp
+++ b/llvm/lib/Target/X86/X86FastPreTileConfig.cpp
@@ -362,7 +362,8 @@ void X86FastPreTileConfig::convertPHI(MachineBasicBlock *MBB,
MachineBasicBlock::iterator InsertPos;
if (TileDefMI->isPHI()) {
InsertPos = TileDefMI->getParent()->getFirstNonPHI();
- if (VisitedPHIs.count(TileDefMI)) { // circular phi reference
+ if (auto It = VisitedPHIs.find(TileDefMI);
+ It != VisitedPHIs.end()) { // circular phi reference
// def t1
// / \
// def t2 t3 = phi(t1, t4) <--
@@ -372,9 +373,9 @@ void X86FastPreTileConfig::convertPHI(MachineBasicBlock *MBB,
// For each (row, column and stack address) append phi incoming value.
// Create r3 = phi(r1, r4)
// Create r4 = phi(r2, r3)
- Register InRowReg = VisitedPHIs[TileDefMI].Row;
- Register InColReg = VisitedPHIs[TileDefMI].Col;
- Register InStackAddrReg = VisitedPHIs[TileDefMI].StackAddr;
+ Register InRowReg = It->second.Row;
+ Register InColReg = It->second.Col;
+ Register InStackAddrReg = It->second.StackAddr;
RowPHI.addReg(InRowReg).addMBB(InMBB);
ColPHI.addReg(InColReg).addMBB(InMBB);
AddrPHI.addReg(InStackAddrReg).addMBB(InMBB);
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