1 ; NOTE: Assertions have been autogenerated by update_test_checks.py
2 ; RUN: opt < %s -instsimplify -S | FileCheck %s
3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
4 target triple = "x86_64-unknown-linux-gnu"
6 define i64 @ptrdiff1(i8* %ptr) {
7 ; CHECK-LABEL: @ptrdiff1(
10 %first = getelementptr inbounds i8, i8* %ptr, i32 0
11 %last = getelementptr inbounds i8, i8* %ptr, i32 42
12 %first.int = ptrtoint i8* %first to i64
13 %last.int = ptrtoint i8* %last to i64
14 %diff = sub i64 %last.int, %first.int
18 define i64 @ptrdiff2(i8* %ptr) {
19 ; CHECK-LABEL: @ptrdiff2(
22 %first1 = getelementptr inbounds i8, i8* %ptr, i32 0
23 %first2 = getelementptr inbounds i8, i8* %first1, i32 1
24 %first3 = getelementptr inbounds i8, i8* %first2, i32 2
25 %first4 = getelementptr inbounds i8, i8* %first3, i32 4
26 %last1 = getelementptr inbounds i8, i8* %first2, i32 48
27 %last2 = getelementptr inbounds i8, i8* %last1, i32 8
28 %last3 = getelementptr inbounds i8, i8* %last2, i32 -4
29 %last4 = getelementptr inbounds i8, i8* %last3, i32 -4
30 %first.int = ptrtoint i8* %first4 to i64
31 %last.int = ptrtoint i8* %last4 to i64
32 %diff = sub i64 %last.int, %first.int
36 define i64 @ptrdiff3(i8* %ptr) {
37 ; Don't bother with non-inbounds GEPs.
38 ; CHECK-LABEL: @ptrdiff3(
39 ; CHECK: [[LAST:%.*]] = getelementptr i8, i8* %ptr, i32 42
40 ; CHECK-NEXT: [[FIRST_INT:%.*]] = ptrtoint i8* %ptr to i64
41 ; CHECK-NEXT: [[LAST_INT:%.*]] = ptrtoint i8* [[LAST]] to i64
42 ; CHECK-NEXT: [[DIFF:%.*]] = sub i64 [[LAST_INT]], [[FIRST_INT]]
43 ; CHECK-NEXT: ret i64 [[DIFF]]
45 %first = getelementptr i8, i8* %ptr, i32 0
46 %last = getelementptr i8, i8* %ptr, i32 42
47 %first.int = ptrtoint i8* %first to i64
48 %last.int = ptrtoint i8* %last to i64
49 %diff = sub i64 %last.int, %first.int
53 define <4 x i32> @ptrdiff4(<4 x i8*> %arg) nounwind {
54 ; Handle simple cases of vectors of pointers.
55 ; CHECK-LABEL: @ptrdiff4(
56 ; CHECK: ret <4 x i32> zeroinitializer
58 %p1 = ptrtoint <4 x i8*> %arg to <4 x i32>
59 %bc = bitcast <4 x i8*> %arg to <4 x i32*>
60 %p2 = ptrtoint <4 x i32*> %bc to <4 x i32>
61 %sub = sub <4 x i32> %p1, %p2
65 %struct.ham = type { i32, [2 x [2 x i32]] }
67 @global = internal global %struct.ham zeroinitializer, align 4
69 define i32 @ptrdiff5() nounwind {
70 ; CHECK-LABEL: @ptrdiff5(
72 ; CHECK-NEXT: ret i32 0
75 %tmp = getelementptr inbounds %struct.ham, %struct.ham* @global, i32 0, i32 1
76 %tmp1 = getelementptr inbounds [2 x [2 x i32]], [2 x [2 x i32]]* %tmp, i32 0, i32 0
77 %tmp2 = bitcast [2 x i32]* %tmp1 to i32*
78 %tmp3 = ptrtoint i32* %tmp2 to i32
79 %tmp4 = getelementptr inbounds %struct.ham, %struct.ham* @global, i32 0, i32 1
80 %tmp5 = getelementptr inbounds [2 x [2 x i32]], [2 x [2 x i32]]* %tmp4, i32 0, i32 0
81 %tmp6 = ptrtoint [2 x i32]* %tmp5 to i32
82 %tmp7 = sub i32 %tmp3, %tmp6