1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=mergeicmps < %s | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
%"struct.a::c" = type { i32, ptr, ptr }
; The entry block cannot be merged as the comparison is not continuous.
; While it compares the highest address, it should not be moved after the
; other comparisons, as that would make the allocas non-dominating.
define i1 @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT: "land.lhs.true+entry":
; CHECK-NEXT: [[H:%.*]] = alloca %"struct.a::c", align 8
; CHECK-NEXT: [[I:%.*]] = alloca %"struct.a::c", align 8
; CHECK-NEXT: call void @init(ptr [[H]])
; CHECK-NEXT: call void @init(ptr [[I]])
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds %"struct.a::c", ptr [[H]], i64 0, i32 1
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds %"struct.a::c", ptr [[I]], i64 0, i32 1
; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(ptr [[TMP0]], ptr [[TMP1]], i64 16)
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0
; CHECK-NEXT: br i1 [[TMP2]], label [[LAND_RHS1:%.*]], label [[LAND_END:%.*]]
; CHECK: land.rhs1:
; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[H]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[I]], align 8
; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[TMP3]], [[TMP4]]
; CHECK-NEXT: br label [[LAND_END]]
; CHECK: land.end:
; CHECK-NEXT: [[V9:%.*]] = phi i1 [ [[TMP5]], [[LAND_RHS1]] ], [ false, %"land.lhs.true+entry" ]
; CHECK-NEXT: ret i1 [[V9]]
;
entry:
%h = alloca %"struct.a::c", align 8
%i = alloca %"struct.a::c", align 8
call void @init(ptr %h)
call void @init(ptr %i)
%e = getelementptr inbounds %"struct.a::c", ptr %h, i64 0, i32 2
%v3 = load ptr, ptr %e, align 8
%e2 = getelementptr inbounds %"struct.a::c", ptr %i, i64 0, i32 2
%v4 = load ptr, ptr %e2, align 8
%cmp = icmp eq ptr %v3, %v4
br i1 %cmp, label %land.lhs.true, label %land.end
land.lhs.true: ; preds = %entry
%d = getelementptr inbounds %"struct.a::c", ptr %h, i64 0, i32 1
%v5 = load ptr, ptr %d, align 8
%d3 = getelementptr inbounds %"struct.a::c", ptr %i, i64 0, i32 1
%v6 = load ptr, ptr %d3, align 8
%cmp4 = icmp eq ptr %v5, %v6
br i1 %cmp4, label %land.rhs, label %land.end
land.rhs: ; preds = %land.lhs.true
%v7 = load i32, ptr %h, align 8
%v8 = load i32, ptr %i, align 8
%cmp6 = icmp eq i32 %v7, %v8
br label %land.end
land.end: ; preds = %land.rhs, %land.lhs.true, %entry
%v9 = phi i1 [ false, %land.lhs.true ], [ false, %entry ], [ %cmp6, %land.rhs ]
ret i1 %v9
}
declare void @init(ptr)
|
