[PATCH] D87850: Fold the comparison of bitcasted global values

[Shimin Cui via Phabricator via llvm-commits]

scui created this revision.
scui added a reviewer: jsji.
Herald added subscribers: llvm-commits, hiraditya.
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This is to simplify icmp instructions in the form like:

  %cmp = icmp eq i32 (i8*, i8*)* bitcast (i32 (i32**, i32**)* @f32 to i32 (i8*, i8*)), bitcast (i32 (i64**, i64**) @f64 to i32 (i8*, i8*)*)

Here @f32 and @f64 are two functions.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87850

Files:
  llvm/lib/IR/ConstantFold.cpp
  llvm/test/Transforms/InstCombine/2004-11-27-SetCCForCastLargerAndConstant.ll
  llvm/test/Transforms/InstCombine/icmp-bitcast-func.ll
  llvm/test/Transforms/InstCombine/pr32686.ll
  llvm/test/Transforms/SCCP/ip-ranges-select.ll
  llvm/test/Transforms/SCCP/undef-resolve.ll
  llvm/test/Transforms/SimplifyCFG/PR17073.ll

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