[PATCH] D40231: InstructionSimplify: 'extractelement' with an undef index is undef

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: test/CodeGen/AMDGPU/indirect-addressing-si-noopt.ll:24
+; CHECK-LABEL: {{^}}extract_adjacent_blocks:
+define amdgpu_kernel void @extract_adjacent_blocks(i32 %arg) #0 {
+bb:
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The checks were still dropped. Does -O0 prevent the inst simplify?

I really wish llc ran no IR optimizations, but we're stuck working around it


https://reviews.llvm.org/D40231