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llvm-project/llvm/test/Reduce/remove-global-vars.ll

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[Bugpoint redesign] Added Pass to Remove Global Variables Summary: This pass tries to remove Global Variables, as well as their derived uses. For example if a variable `@x` is used by `%call1` and `%call2`, both these uses and the definition of `@x` are deleted. Moreover if `%call1` or `%call2` are used elsewhere those uses are also deleted, and so on recursively. I'm still uncertain if this pass should remove derived uses, I'm open to suggestions. Subscribers: mgorny, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D64176 > llvm-svn: 368918 llvm-svn: 369061
2019-08-16 06:54:09 +08:00
; Test that llvm-reduce can remove uninteresting Global Variables as well as
; their direct uses (which in turn are replaced with 'undef').
;
llvm-reduce: Clean out previous test temp/output dir, since it was a dir and now it's used as just a single file llvm-svn: 372054
2019-09-17 07:56:26 +08:00
; RUN: rm -rf %t
llvm-reduce: Make tests shell-independent by passing the interpreter on the command line rather than using #! in the test file llvm-svn: 372049
2019-09-17 07:41:19 +08:00
; 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
[Bugpoint redesign] Added Pass to Remove Global Variables Summary: This pass tries to remove Global Variables, as well as their derived uses. For example if a variable `@x` is used by `%call1` and `%call2`, both these uses and the definition of `@x` are deleted. Moreover if `%call1` or `%call2` are used elsewhere those uses are also deleted, and so on recursively. I'm still uncertain if this pass should remove derived uses, I'm open to suggestions. Subscribers: mgorny, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D64176 > llvm-svn: 368918 llvm-svn: 369061
2019-08-16 06:54:09 +08:00
; 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: %inc = add nsw i32 undef, 1
%inc = add nsw i32 %0, 1
; CHECK: store i32 %inc, i32* @interesting, align 4
store i32 %inc, i32* @interesting, align 4
ret i32 0
}