[llvm] [llvm] Remove `br i1 undef` in `llvm/test/CodeGen` tests (PR #127368)

[Matt Arsenault via llvm-commits]

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@@ -10,9 +10,9 @@
 ;
 ; GCN: s_endpgm
 
-define amdgpu_ps void @main(i32 %in1) local_unnamed_addr {
+define amdgpu_ps void @main(i32 %in1, i1 %arg) local_unnamed_addr {
 .entry:
-  br i1 undef, label %bb12, label %bb
+  br i1 %arg, label %bb12, label %bb
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arsenm wrote:

This is a change from a uniform branch to a divergent branch. To closer emulate the original scenario, this should use an i32 inreg argument and an icmp to get the condition 

https://github.com/llvm/llvm-project/pull/127368