1; Tests to make sure elimination of casts is working correctly
2; RUN: llvm-as < %s | opt -instcombine | llvm-dis | FileCheck %s
3
4target datalayout = "p:32:32"
5
6; This shouldn't convert to getelementptr because the relationship
7; between the arithmetic and the layout of allocated memory is
8; entirely unknown.
9; CHECK: @test1
10; CHECK: ptrtoint
11; CHECK: add
12; CHECK: inttoptr
13define i8* @test1(i8* %t) {
14        %tmpc = ptrtoint i8* %t to i32          ; <i32> [#uses=1]
15        %tmpa = add i32 %tmpc, 32               ; <i32> [#uses=1]
16        %tv = inttoptr i32 %tmpa to i8*         ; <i8*> [#uses=1]
17        ret i8* %tv
18}
19
20; These casts should be folded away.
21; CHECK: @test2
22; CHECK: icmp eq i8* %a, %b
23define i1 @test2(i8* %a, i8* %b) {
24        %tmpa = ptrtoint i8* %a to i32          ; <i32> [#uses=1]
25        %tmpb = ptrtoint i8* %b to i32          ; <i32> [#uses=1]
26        %r = icmp eq i32 %tmpa, %tmpb           ; <i1> [#uses=1]
27        ret i1 %r
28}
29
30