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llvm-mirror/test/Transforms/GVN/load-constant-mem.ll
Arthur Eubanks fc1584be52 [NewPM][BasicAA] basicaa -> basic-aa in Transforms/{New,}GVN
Summary: Following https://reviews.llvm.org/D82607.

Reviewers: ychen

Subscribers: asbirlea, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82688
2020-06-26 20:28:18 -07:00

20 lines
474 B
LLVM

; RUN: opt < %s -basic-aa -gvn -instcombine -S | FileCheck %s
; PR4189
@G = external constant [4 x i32]
define i32 @test(i8* %p, i32 %i) nounwind {
entry:
%P = getelementptr [4 x i32], [4 x i32]* @G, i32 0, i32 %i
%A = load i32, i32* %P
store i8 4, i8* %p
%B = load i32, i32* %P
%C = sub i32 %A, %B
ret i32 %C
}
; CHECK: define i32 @test(i8* %p, i32 %i) #0 {
; CHECK-NEXT: entry:
; CHECK-NEXT: store i8 4, i8* %p, align 1
; CHECK-NEXT: ret i32 0
; CHECK-NEXT: }