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gerrit-public.fairphone.software / toolchain / llvm-project / b1554311d3c38d10d064ccf11c6486a87a11ccce / . / llvm / test / Transforms / IndVarSimplify / strengthen-overflow.ll
blob: 2bafe96e1cccdcfeb648768229b6f03f8c70916a [file] [log] [blame]
Sanjoy Das7c0ce262015-01-06 19:02:56 +0000[diff] [blame]1; RUN: opt < %s -indvars -S | FileCheck %s
2
3define i32 @test.signed.add.0(i32* %array, i32 %length, i32 %init) {
4; CHECK-LABEL: @test.signed.add.0
5 entry:
6 %upper = icmp slt i32 %init, %length
7 br i1 %upper, label %loop, label %exit
8
9 loop:
10; CHECK-LABEL: loop
11 %civ = phi i32 [ %init, %entry ], [ %civ.inc, %latch ]
12 %civ.inc = add i32 %civ, 1
13; CHECK: %civ.inc = add nsw i32 %civ, 1
14 %cmp = icmp slt i32 %civ.inc, %length
15 br i1 %cmp, label %latch, label %break
16
17 latch:
18 store i32 0, i32* %array
19 %check = icmp slt i32 %civ.inc, %length
20 br i1 %check, label %loop, label %break
21
22 break:
23 ret i32 %civ.inc
24
25 exit:
26 ret i32 42
27}
28
29define i32 @test.signed.add.1(i32* %array, i32 %length, i32 %init) {
30; CHECK-LABEL: @test.signed.add.1
31 entry:
32 %upper = icmp sle i32 %init, %length
33 br i1 %upper, label %loop, label %exit
34
35 loop:
36; CHECK-LABEL: loop
37 %civ = phi i32 [ %init, %entry ], [ %civ.inc, %latch ]
38 %civ.inc = add i32 %civ, 1
39; CHECK: %civ.inc = add i32 %civ, 1
40 %cmp = icmp slt i32 %civ.inc, %length
41 br i1 %cmp, label %latch, label %break
42
43 latch:
44 store i32 0, i32* %array
45 %check = icmp slt i32 %civ.inc, %length
46 br i1 %check, label %loop, label %break
47
48 break:
49 ret i32 %civ.inc
50
51 exit:
52 ret i32 42
53}
54
Sanjoy Das7c0ce262015-01-06 19:02:56 +0000[diff] [blame]55define i32 @test.unsigned.add.0(i32* %array, i32 %length, i32 %init) {
56; CHECK-LABEL: @test.unsigned.add.0
57 entry:
58 %upper = icmp ult i32 %init, %length
59 br i1 %upper, label %loop, label %exit
60
61 loop:
62; CHECK-LABEL: loop
63 %civ = phi i32 [ %init, %entry ], [ %civ.inc, %latch ]
64 %civ.inc = add i32 %civ, 1
65; CHECK: %civ.inc = add nuw i32 %civ, 1
66 %cmp = icmp slt i32 %civ.inc, %length
67 br i1 %cmp, label %latch, label %break
68
69 latch:
70 store i32 0, i32* %array
71 %check = icmp ult i32 %civ.inc, %length
72 br i1 %check, label %loop, label %break
73
74 break:
75 ret i32 %civ.inc
76
77 exit:
78 ret i32 42
79}
80
81define i32 @test.unsigned.add.1(i32* %array, i32 %length, i32 %init) {
82; CHECK-LABEL: @test.unsigned.add.1
83 entry:
84 %upper = icmp ule i32 %init, %length
85 br i1 %upper, label %loop, label %exit
86
87 loop:
88; CHECK-LABEL: loop
89 %civ = phi i32 [ %init, %entry ], [ %civ.inc, %latch ]
90 %civ.inc = add i32 %civ, 1
91; CHECK: %civ.inc = add i32 %civ, 1
92 %cmp = icmp slt i32 %civ.inc, %length
93 br i1 %cmp, label %latch, label %break
94
95 latch:
96 store i32 0, i32* %array
97 %check = icmp ult i32 %civ.inc, %length
98 br i1 %check, label %loop, label %break
99
100 break:
101 ret i32 %civ.inc
102
103 exit:
104 ret i32 42
105}
106
Sanjoy Das7c0ce262015-01-06 19:02:56 +0000[diff] [blame]107!0 = !{i32 0, i32 2}
108!1 = !{i32 0, i32 42}