[X86] Avoid repeated hash lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-backend-x86

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/130393.diff

1 Files Affected:

• (modified) llvm/lib/Target/X86/X86PreTileConfig.cpp (+3-2)

diff --git a/llvm/lib/Target/X86/X86PreTileConfig.cpp b/llvm/lib/Target/X86/X86PreTileConfig.cpp
index e8d90da1fb1e0..f2ec4369a5ca4 100644
--- a/llvm/lib/Target/X86/X86PreTileConfig.cpp
+++ b/llvm/lib/Target/X86/X86PreTileConfig.cpp
@@ -400,8 +400,9 @@ bool X86PreTileConfig::runOnMachineFunction(MachineFunction &MF) {
     // A given point might be forked due to shape conditions are not met.
     for (MIRef I : InsertPoints) {
       // Make sure we insert ldtilecfg after the last shape def in MBB.
-      if (ShapeBBs.count(I.MBB) && I < ShapeBBs[I.MBB].back())
-        I = ShapeBBs[I.MBB].back();
+      auto It = ShapeBBs.find(I.MBB);
+      if (It != ShapeBBs.end() && I < It->second.back())
+        I = It->second.back();
       // There're chances the MBB is sunk more than once. Record it to avoid
       // multi insert.
       if (VisitedOrInserted.insert(I).second) {

[llvm-ci]

LLVM Buildbot has detected a new failure on builder llvm-clang-x86_64-win-fast running on as-builder-3 while building llvm at step 7 "test-build-unified-tree-check-llvm-unit".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/2/builds/18775

Here is the relevant piece of the build log for the reference

Step 7 (test-build-unified-tree-check-llvm-unit) failure: test (failure)
******************** TEST 'LLVM-Unit :: Support/./SupportTests.exe/49/86' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:C:\buildbot\as-builder-3\llvm-clang-x86_64-win-fast\build\unittests\Support\.\SupportTests.exe-LLVM-Unit-9948-49-86.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=86 GTEST_SHARD_INDEX=49 C:\buildbot\as-builder-3\llvm-clang-x86_64-win-fast\build\unittests\Support\.\SupportTests.exe
--

Script:
--
C:\buildbot\as-builder-3\llvm-clang-x86_64-win-fast\build\unittests\Support\.\SupportTests.exe --gtest_filter=Caching.NoCommit
--
C:\buildbot\as-builder-3\llvm-clang-x86_64-win-fast\llvm-project\llvm\unittests\Support\Caching.cpp(142): error: Value of: AddStream
  Actual: false
Expected: true


C:\buildbot\as-builder-3\llvm-clang-x86_64-win-fast\llvm-project\llvm\unittests\Support\Caching.cpp:142
Value of: AddStream
  Actual: false
Expected: true



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