[llvm] 3d864c4 - [LowerTypeTests] Skip declarations when determining Thumb support

[via llvm-commits]

Author: Alexander Richardson
Date: 2025-03-04T08:47:18-08:00
New Revision: 3d864c4682fd28624ece3aa2e413e16bf0e3ef3b

URL: https://github.com/llvm/llvm-project/commit/3d864c4682fd28624ece3aa2e413e16bf0e3ef3b
DIFF: https://github.com/llvm/llvm-project/commit/3d864c4682fd28624ece3aa2e413e16bf0e3ef3b.diff

LOG: [LowerTypeTests] Skip declarations when determining Thumb support

When looping over all functions in a module to determine whether any of
them is built with support for B.W, we can skip declarations since those
do not have an associated target-feature attribute.
This was found by the assertion from https://github.com/llvm/llvm-project/pull/129600

Reviewed By: statham-arm

Pull Request: https://github.com/llvm/llvm-project/pull/129599

Added: 
    

Modified: 
    llvm/lib/Transforms/IPO/LowerTypeTests.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
index e3caefe70311b..3a3c8ef654dcc 100644
--- a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
+++ b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
@@ -1847,6 +1847,9 @@ LowerTypeTestsModule::LowerTypeTestsModule(
     auto &FAM =
         AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
     for (Function &F : M) {
+      // Skip declarations since we should not query the TTI for them.
+      if (F.isDeclaration())
+        continue;
       auto &TTI = FAM.getResult<TargetIRAnalysis>(F);
       if (TTI.hasArmWideBranch(false))
         CanUseArmJumpTable = true;