1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
3 target datalayout = "p:32:32"
5 ; Check some past-the-end subtleties.
10 ; Comparing base addresses of two distinct globals. Never equal.
12 define zeroext i1 @no_offsets() {
13 ; CHECK-LABEL: @no_offsets(
14 ; CHECK-NEXT: ret i1 false
16 %t = icmp eq ptr @opte_a, @opte_b
20 ; Comparing past-the-end addresses of two distinct globals. Never equal.
22 define zeroext i1 @both_past_the_end() {
23 ; CHECK-LABEL: @both_past_the_end(
24 ; CHECK-NEXT: [[T:%.*]] = icmp eq ptr getelementptr inbounds (i8, ptr @opte_a, i32 4), getelementptr inbounds (i8, ptr @opte_b, i32 4)
25 ; CHECK-NEXT: ret i1 [[T]]
27 %x = getelementptr i32, ptr @opte_a, i32 1
28 %y = getelementptr i32, ptr @opte_b, i32 1
29 %t = icmp eq ptr %x, %y
34 ; Comparing past-the-end addresses of one global to the base address
35 ; of another. Can't fold this.
37 define zeroext i1 @just_one_past_the_end() {
38 ; CHECK-LABEL: @just_one_past_the_end(
39 ; CHECK-NEXT: [[T:%.*]] = icmp eq ptr getelementptr inbounds (i8, ptr @opte_a, i32 4), @opte_b
40 ; CHECK-NEXT: ret i1 [[T]]
42 %x = getelementptr i32, ptr @opte_a, i32 1
43 %t = icmp eq ptr %x, @opte_b
47 ; Comparing base addresses of two distinct allocas. Never equal.
49 define zeroext i1 @no_alloca_offsets() {
50 ; CHECK-LABEL: @no_alloca_offsets(
51 ; CHECK-NEXT: ret i1 false
55 %t = icmp eq ptr %m, %n
59 ; Comparing past-the-end addresses of two distinct allocas. Never equal.
61 define zeroext i1 @both_past_the_end_alloca() {
62 ; CHECK-LABEL: @both_past_the_end_alloca(
63 ; CHECK-NEXT: ret i1 false
67 %x = getelementptr i32, ptr %m, i32 1
68 %y = getelementptr i32, ptr %n, i32 1
69 %t = icmp eq ptr %x, %y
73 ; Comparing past-the-end addresses of one alloca to the base address
74 ; of another. Can't fold this.
76 define zeroext i1 @just_one_past_the_end_alloca() {
77 ; CHECK-LABEL: @just_one_past_the_end_alloca(
78 ; CHECK-NEXT: [[M:%.*]] = alloca i32, align 4
79 ; CHECK-NEXT: [[N:%.*]] = alloca i32, align 4
80 ; CHECK-NEXT: [[X:%.*]] = getelementptr i32, ptr [[M]], i32 1
81 ; CHECK-NEXT: [[T:%.*]] = icmp eq ptr [[X]], [[N]]
82 ; CHECK-NEXT: ret i1 [[T]]
86 %x = getelementptr i32, ptr %m, i32 1
87 %t = icmp eq ptr %x, %n