source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/ScalarEvolution/range-signedness.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 882 bytes
Line 
1; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
2
3define void @x(i1* %cond) {
4; CHECK-LABEL: Classifying expressions for: @x
5 entry:
6  br label %loop
7
8 loop:
9  %idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ]
10; CHECK: %idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ]
11; CHECK-NEXT:  -->  {0,+,1}<nuw><nsw><%loop> U: [0,-128) S: [0,-128)
12
13  %idx.inc = add nsw i8 %idx, 1
14
15  %c = load volatile i1, i1* %cond
16  br i1 %c, label %loop, label %exit
17
18 exit:
19  ret void
20}
21
22define void @y(i8* %addr) {
23; CHECK-LABEL: Classifying expressions for: @y
24 entry:
25  br label %loop
26
27 loop:
28  %idx = phi i8 [-5, %entry ], [ %idx.inc, %loop ]
29; CHECK:   %idx = phi i8 [ -5, %entry ], [ %idx.inc, %loop ]
30; CHECK-NEXT:  -->  {-5,+,1}<%loop> U: [-5,6) S: [-5,6)
31
32  %idx.inc = add i8 %idx, 1
33
34  %continue = icmp slt i8 %idx.inc, 6
35  br i1 %continue, label %loop, label %exit
36
37 exit:
38  ret void
39}
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