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llvm-project/llvm/test/tools/llvm-extract/keep-constinit.ll

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[llvm-extract] Add -keep-const-init commandline option Summary: This adds -keep-const-init option to llvm-extract which preserves initializers of used global constants. For example: ``` $ cat a.ll @g = constant i32 0 define i32 @f() { %v = load i32, i32* @g ret i32 %v } $ llvm-extract --func=f a.ll -S -o - @g = external constant i32 define i32 @f() { .. } $ llvm-extract --func=f a.ll -keep-const-init -S -o - @g = constant i32 0 define i32 @f() { .. } ``` This option is useful in checking whether a function that uses a constant global is optimized correctly. Reviewers: jsji, MaskRay, david2050 Reviewed By: MaskRay Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D73833
2020-02-02 01:34:10 +08:00
; RUN: llvm-extract -func foo -keep-const-init -S < %s | FileCheck %s
; RUN: llvm-extract -func foo -S < %s | FileCheck %s --check-prefix=CHECK2
; CHECK: @cv = constant i32 0
; CHECK2: @cv = external constant i32
@cv = constant i32 0
define i32 @foo() {
%v = load i32, i32* @cv
ret i32 %v
}