[compiler-rt] [clang-tools-extra] [llvm] [clang] [PGO][GlobalValue][LTO]In GlobalValues::getGlobalIdentifier, use semicolon as delimiter for local-linkage varibles. (PR #74008)

[Teresa Johnson via cfe-commits]

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@@ -1,39 +1,45 @@
-; Do setup work for all below tests: generate bitcode and combined index
-; RUN: opt -module-summary %s -o %t.bc
-; RUN: opt -module-summary %p/Inputs/thinlto_indirect_call_promotion.ll -o %t2.bc
+; The raw profiles and reduced IR inputs are generated from Inputs/update_icall_promotion_inputs.sh
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teresajohnson wrote:

The reason for having this in a single test this way is specifically to detect mismatches in the separator used in the PGO name and in the ThinLTO index. For this we need to convert from raw profile and feed it through ThinLTO+ICP. 

Having separate tests would not do this. I.e. with the change from ':' to ';', the compiler-rt test would presumably have failed and would be updated, but the test using the proftext input would not fail. The lack of testing these pieces together led to the prior separator rename not updating all the necessary compiler bits.

https://github.com/llvm/llvm-project/pull/74008