[llvm] [PGO] Add ProfileInjector and ProfileVerifier passes (PR #147388)

[Snehasish Kumar via llvm-commits]

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@@ -0,0 +1,21 @@
+; Test that prof-inject does not modify existing metadata (incl. "unknown")
+
+; RUN: opt -passes=prof-inject %s -S -o - | FileCheck %s
+; RUN: opt -passes=prof-verify %s -S --disable-output
+
+define void @foo(i32 %i) {
+  %c = icmp eq i32 %i, 0
+  br i1 %c, label %yes, label %no, !prof !0
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snehasish wrote:

This test only verifies that no modifications take place for `Instruction::Br`. If you want to have a test like this, we should cover the other terminators too.

https://github.com/llvm/llvm-project/pull/147388