1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
; RUN: opt < %s -S -instcombine | FileCheck %s
; rdar://problem/9267970
; ideally this test will run on a 32-bit host
; must not discard GEPs that might overflow at runtime (aren't inbounds)
define i32 @main(i32 %argc) {
entry:
%tmp1 = add i32 %argc, -2
%tmp2 = add i32 %argc, 1879048192
%p = alloca i8
; CHECK: getelementptr
%p1 = getelementptr i8, i8* %p, i32 %tmp1
; CHECK: getelementptr
%p2 = getelementptr i8, i8* %p, i32 %tmp2
%cmp = icmp ult i8* %p1, %p2
br i1 %cmp, label %bbtrue, label %bbfalse
bbtrue: ; preds = %entry
ret i32 -1
bbfalse: ; preds = %entry
ret i32 0
}
|
