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llvm-mirror/test/Reduce/remove-global-vars.ll
David Blaikie d5d1d93e4d llvm-reduce: Add pass to reduce instructions
Patch by Diego Treviño!

Differential Revision: https://reviews.llvm.org/D66263

llvm-svn: 372282
2019-09-19 00:59:27 +00:00

26 lines
835 B
LLVM

; Test that llvm-reduce can remove uninteresting Global Variables as well as
; their direct uses (which in turn are replaced with 'undef').
;
; RUN: rm -rf %t
; RUN: llvm-reduce --test %python --test-arg %p/Inputs/remove-global-vars.py %s -o %t
; RUN: cat %t | FileCheck -implicit-check-not=uninteresting %s
; CHECK: @interesting = global
@interesting = global i32 0, align 4
@uninteresting = global i32 1, align 4
define i32 @main() {
entry:
%0 = load i32, i32* @uninteresting, align 4
; CHECK: store i32 undef, i32* @interesting, align 4
store i32 %0, i32* @interesting, align 4
; CHECK: load i32, i32* @interesting, align 4
%1 = load i32, i32* @interesting, align 4
store i32 %1, i32* @uninteresting, align 4
; CHECK: store i32 5, i32* @interesting, align 4
store i32 5, i32* @interesting, align 4
ret i32 0
}