[llvm] [InstCombine] Optimize redundant floating point comparisons in `or`/`and` inst's (PR #158097)

[Rajveer Singh Bharadwaj via llvm-commits]

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@@ -0,0 +1,134 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -O3 -S | FileCheck %s
+
+define i1 @or_fcmp_redundant_or1(double %v0) {
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Rajveer100 wrote:

So actually earlier this optimisation was in `InstCombine` itself, so the redundant instruction wasn't being removed.

Now after placing it in `InstructionSimplify`, it gets eliminated.

Duplication is not needed now.

https://github.com/llvm/llvm-project/pull/158097