xref: /aosp_15_r20/external/clang/test/CodeGen/2008-07-31-promotion-of-compound-pointer-arithmetic.c (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 -triple i386-unknown-unknown -O1 -emit-llvm -o - %s | FileCheck %s
2*67e74705SXin Li // CHECK-LABEL: define i32 @f0
3*67e74705SXin Li // CHECK:   ret i32 1
4*67e74705SXin Li // CHECK-LABEL: define i32 @f1
5*67e74705SXin Li // CHECK:   ret i32 1
6*67e74705SXin Li // CHECK-LABEL: define i32 @f2
7*67e74705SXin Li // CHECK:   ret i32 1
8*67e74705SXin Li // <rdr://6115726>
9*67e74705SXin Li 
f0()10*67e74705SXin Li int f0() {
11*67e74705SXin Li   int x;
12*67e74705SXin Li   unsigned short n = 1;
13*67e74705SXin Li   int *a = &x;
14*67e74705SXin Li   int *b = &x;
15*67e74705SXin Li   a = a - n;
16*67e74705SXin Li   b -= n;
17*67e74705SXin Li   return a == b;
18*67e74705SXin Li }
19*67e74705SXin Li 
f1(int * a)20*67e74705SXin Li int f1(int *a) {
21*67e74705SXin Li   long b = a - (int*) 1;
22*67e74705SXin Li   a -= (int*) 1;
23*67e74705SXin Li   return b == (long) a;
24*67e74705SXin Li }
25*67e74705SXin Li 
f2(long n)26*67e74705SXin Li int f2(long n) {
27*67e74705SXin Li   int *b = n + (int*) 1;
28*67e74705SXin Li   n += (int*) 1;
29*67e74705SXin Li   return b == (int*) n;
30*67e74705SXin Li }
31*67e74705SXin Li 
32