[llvm] [LV] Peek through bitcasts when performing CSE (PR #146856)

[Ramkumar Ramachandra via llvm-commits]

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@@ -0,0 +1,77 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "^scalar.ph" --version 5
+; RUN: opt %s -passes=loop-vectorize -S | FileCheck %s
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @bitcast-cse(i16 %val, half %fval, ptr %p, i64 %n) {
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artagnon wrote:

I checked, and I think this test can be moved into dead_instructions.ll, making it target-independent using a -force-vector-width, as dead_instructions.ll shows.

https://github.com/llvm/llvm-project/pull/146856