1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -instcombine -S | FileCheck %s
3target datalayout = "p:16:16"
4
5@a = external global [21 x i16], align 1
6@offsets = external global [4 x i16], align 1
7
8; The "same gep" optimization should work with vector icmp.
9define <4 x i1> @PR38984_1() {
10; CHECK-LABEL: @PR38984_1(
11; CHECK-NEXT:  entry:
12; CHECK-NEXT:    ret <4 x i1> <i1 true, i1 true, i1 true, i1 true>
13;
14entry:
15  %0 = load i16, i16* getelementptr ([4 x i16], [4 x i16]* @offsets, i16 0, i16 undef), align 1
16  %1 = insertelement <4 x i16> undef, i16 %0, i32 3
17  %2 = getelementptr i32, i32* null, <4 x i16> %1
18  %3 = getelementptr i32, i32* null, <4 x i16> %1
19  %4 = icmp eq <4 x i32*> %2, %3
20  ret <4 x i1> %4
21}
22
23; The "compare base pointers" optimization should not kick in for vector icmp.
24define <4 x i1> @PR38984_2() {
25; CHECK-LABEL: @PR38984_2(
26; CHECK-NEXT:  entry:
27; CHECK-NEXT:    [[TMP0:%.*]] = load i16, i16* getelementptr ([4 x i16], [4 x i16]* @offsets, i16 0, i16 undef), align 2
28; CHECK-NEXT:    [[TMP1:%.*]] = insertelement <4 x i16> undef, i16 [[TMP0]], i32 3
29; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr i16, i16* getelementptr inbounds ([21 x i16], [21 x i16]* @a, i16 1, i16 0), <4 x i16> [[TMP1]]
30; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr i16, i16* null, <4 x i16> [[TMP1]]
31; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq <4 x i16*> [[TMP2]], [[TMP3]]
32; CHECK-NEXT:    ret <4 x i1> [[TMP4]]
33;
34entry:
35  %0 = load i16, i16* getelementptr ([4 x i16], [4 x i16]* @offsets, i16 0, i16 undef)
36  %1 = insertelement <4 x i16> undef, i16 %0, i32 3
37  %2 = getelementptr i16, i16* getelementptr ([21 x i16], [21 x i16]* @a, i64 1, i32 0), <4 x i16> %1
38  %3 = getelementptr i16, i16* null, <4 x i16> %1
39  %4 = icmp eq <4 x i16*> %2, %3
40  ret <4 x i1> %4
41}
42