[PATCH] D73833: Add -keep-constinit commandline option to llvm-extract

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune created this revision.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

This adds -keep-constinit option to llvm-extract which preserves initializers of
used global constants.

For example:

  $ cat a.ll
  @g = constant i32 0
  define void @f() {
    %v = load i32, i32* @g
    ret i32 %v
  }
  
  $ llvm-extract --func=f a.ll -S -o -
  @g = external constant i32
  define void @f() { .. }
  
  $ llvm-extract --func=f a.ll -keep-constinit -S -o -
  @g = constant i32 0
  define void @f() { .. }

This option is useful in checking whether a function that uses a constant global is optimized correctly.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D73833

Files:
  llvm/docs/CommandGuide/llvm-extract.rst
  llvm/include/llvm/Transforms/IPO.h
  llvm/lib/Transforms/IPO/ExtractGV.cpp
  llvm/test/tools/llvm-extract/keep-constinit.ll
  llvm/tools/llvm-extract/llvm-extract.cpp

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