forked from OSchip/llvm-project
17 lines
462 B
LLVM
17 lines
462 B
LLVM
; RUN: opt < %s -basicaa -gvn -instcombine |\
|
|
; RUN: llvm-dis | grep {ret i32 0}
|
|
|
|
declare void @foo(i32*)
|
|
|
|
declare void @bar()
|
|
|
|
define i32 @test() {
|
|
%A = alloca i32 ; <i32*> [#uses=3]
|
|
call void @foo( i32* %A )
|
|
%X = load i32* %A ; <i32> [#uses=1]
|
|
tail call void @bar( )
|
|
%Y = load i32* %A ; <i32> [#uses=1]
|
|
%Z = sub i32 %X, %Y ; <i32> [#uses=1]
|
|
ret i32 %Z
|
|
}
|