[llvm] [AMDGPU] RewriteMFMAFormStage: single exit copy for same-block uses (PR #209179)

[Romanov Vlad via llvm-commits]

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@@ -0,0 +1,84 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
+# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx950 -run-pass=machine-scheduler -amdgpu-disable-rewrite-mfma-form-sched-stage=false %s -o - | FileCheck %s
+
+# Test that only one copy generated for all users of mfma in the same block.
+
+--- |
+  define void @mfma_no_multiple_copies() #0 { ret void }
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romanovvlad wrote:

Done.

https://github.com/llvm/llvm-project/pull/209179