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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target datalayout = "p:16:16"
@a = external global [21 x i16], align 1
@offsets = external global [4 x i16], align 1
; The "same gep" optimization should work with vector icmp.
define <4 x i1> @PR38984_1() {
; CHECK-LABEL: @PR38984_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret <4 x i1> splat (i1 true)
;
entry:
%0 = load i16, ptr @offsets, align 1
%1 = insertelement <4 x i16> poison, i16 %0, i32 3
%2 = getelementptr i32, ptr null, <4 x i16> %1
%3 = getelementptr i32, ptr null, <4 x i16> %1
%4 = icmp eq <4 x ptr> %2, %3
ret <4 x i1> %4
}
; The "compare base pointers" optimization should not kick in for vector icmp.
define <4 x i1> @PR38984_2() {
; CHECK-LABEL: @PR38984_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr @offsets, align 2
; CHECK-NEXT: [[TMP1:%.*]] = insertelement <4 x i16> poison, i16 [[TMP0]], i64 3
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr i16, ptr getelementptr inbounds nuw (i8, ptr @a, i16 42), <4 x i16> [[TMP1]]
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr i16, ptr null, <4 x i16> [[TMP1]]
; CHECK-NEXT: [[TMP4:%.*]] = icmp eq <4 x ptr> [[TMP2]], [[TMP3]]
; CHECK-NEXT: ret <4 x i1> [[TMP4]]
;
entry:
%0 = load i16, ptr @offsets
%1 = insertelement <4 x i16> poison, i16 %0, i32 3
%2 = getelementptr i16, ptr getelementptr ([21 x i16], ptr @a, i64 1, i32 0), <4 x i16> %1
%3 = getelementptr i16, ptr null, <4 x i16> %1
%4 = icmp eq <4 x ptr> %2, %3
ret <4 x i1> %4
}
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