[llvm] [Clang][HLSL][GVN] Prevent phi codgen of isTokenLike types (PR #162363)

[Justin Bogner via llvm-commits]

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@@ -0,0 +1,34 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -S -passes=gvn %s | FileCheck %s
+
+; NOTE: A test to confirm GVN doesn't introduce phis for pre loads of token
+; NOTE: like types. This implies the CHECKS should exactly match the IR.
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bogner wrote:

This comment doesn't seem strictly accurate - looks like GVN split a critical edge in the CHECKs so it doesn't match "exactly"

https://github.com/llvm/llvm-project/pull/162363