1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -mergeicmps -verify-dom-info -mtriple=x86_64-unknown-unknown -S | FileCheck %s
6 ; Check that the transformation is avoided when GEP has a use outside of the
7 ; parant block of the load instruction.
9 define zeroext i32 @opeq1(
10 ; CHECK-LABEL: @opeq1(
12 ; CHECK-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds [[S:%.*]], %S* [[A:%.*]], i64 0, i32 1
13 ; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[FIRST_I]], align 4
14 ; CHECK-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds [[S]], %S* [[B:%.*]], i64 0, i32 1
15 ; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[FIRST1_I]], align 4
16 ; CHECK-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
17 ; CHECK-NEXT: br i1 [[CMP_I]], label [[LAND_RHS_I:%.*]], label [[OPEQ1_EXIT:%.*]]
19 ; CHECK-NEXT: [[SECOND_I:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 0
20 ; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[SECOND_I]], align 4
21 ; CHECK-NEXT: [[SECOND2_I:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 0
22 ; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[SECOND2_I]], align 4
23 ; CHECK-NEXT: [[CMP3_I:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]]
24 ; CHECK-NEXT: br label [[OPEQ1_EXIT]]
26 ; CHECK-NEXT: [[TMP4:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[CMP3_I]], [[LAND_RHS_I]] ]
27 ; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[FIRST_I]], align 4
28 ; CHECK-NEXT: [[TMP6:%.*]] = select i1 [[TMP4]], i32 [[TMP5]], i32 0
29 ; CHECK-NEXT: ret i32 [[TMP6]]
32 %S* nocapture readonly dereferenceable(16) %a,
33 %S* nocapture readonly dereferenceable(16) %b) local_unnamed_addr #0 {
35 %first.i = getelementptr inbounds %S, %S* %a, i64 0, i32 1
36 %0 = load i32, i32* %first.i, align 4
37 %first1.i = getelementptr inbounds %S, %S* %b, i64 0, i32 1
38 %1 = load i32, i32* %first1.i, align 4
39 %cmp.i = icmp eq i32 %0, %1
40 br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
43 %second.i = getelementptr inbounds %S, %S* %a, i64 0, i32 0
44 %2 = load i32, i32* %second.i, align 4
45 %second2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 0
46 %3 = load i32, i32* %second2.i, align 4
47 %cmp3.i = icmp eq i32 %2, %3
51 %4 = phi i1 [ false, %entry ], [ %cmp3.i, %land.rhs.i]
52 %5 = load i32, i32* %first.i, align 4
53 %6 = select i1 %4, i32 %5, i32 0