[llvm-branch-commits] [llvm] [PowerPC][GlobalMerge] Enable GlobalMerge by default on AIX (PR #101226)

[Amy Kwan via llvm-branch-commits]

================
@@ -500,7 +500,10 @@ void PPCPassConfig::addIRPasses() {
 }
 
 bool PPCPassConfig::addPreISel() {
-  if (EnableGlobalMerge)
+  if ((EnableGlobalMerge.getNumOccurrences() > 0)
+          ? EnableGlobalMerge
+          : (TM->getTargetTriple().isOSAIX() &&
+             getOptLevel() != CodeGenOptLevel::None))
----------------
amy-kwan wrote:

Thanks a lot, Kai! I looked into this a bit and I agree. That would be the 
behaviour that we are after here, so I will keep the condition as is, and add a 
comment.

https://github.com/llvm/llvm-project/pull/101226
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