[llvm] [X86] Enforce strict pre-legalization to combine in scalarizeExtEltFP (PR #117681)

[Phoebe Wang via llvm-commits]

================
@@ -0,0 +1,38 @@
+; RUN: llc < %s | FileCheck %s
+
+define void @extvselectsetcc_illegal(i1 %cond, <8 x float> %vec, ptr %ptr1, ptr %ptr2) #0 {
----------------
phoebewang wrote:

What's the illegal mean?

https://github.com/llvm/llvm-project/pull/117681