[llvm] [SCEVExpander] Relax hoisting condition for AddRec start (PR #75916)

[Philip Reames via llvm-commits]

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@@ -0,0 +1,39 @@
+; RUN: opt -passes=indvars < %s
+
+target datalayout = "e-n32:64"
+
+declare void @g(i64)
+
+define void @f(ptr %block_address_arg)  {
+
+; This loop isn't in Simplified Form. Ensure SCEV expander doesn't hit an assert
+; when visiting it.
+f_entry:
+  indirectbr ptr %block_address_arg, [label %f.exit, label %f_for.cond]
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preames wrote:

It's worth pointing out that's there's nothing I see preventing us from inserting a preheader...

https://github.com/llvm/llvm-project/pull/75916