llvm/test/Transforms/NewGVN/load-constant-mem.ll
2017-02-09 23:48:10 +00:00

22 lines
553 B
LLVM

; RUN: opt < %s -basicaa -newgvn -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-LABEL: define i32 @test
; CHECK-NEXT: entry:
; CHECK-NEXT: %P = getelementptr [4 x i32], [4 x i32]* @G, i32 0, i32 %i
; CHECK-NEXT: %A = load i32, i32* %P
; CHECK-NEXT: store i8 4, i8* %p
; CHECK-NEXT: ret i32 0
; CHECK-NEXT: }