File: pr27315.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (31 lines) | stat: -rw-r--r-- 929 bytes parent folder | download | duplicates (18) 
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
 
; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s

declare i1 @use(i64)

define void @f_0() {
; CHECK-LABEL: Classifying expressions for: @f_0

; CHECK:  %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ]
; CHECK-NEXT: -->  {0,+,1}<nuw><nsw><%loop>
; CHECK: %iv.inc.maywrap = add i32 %iv, 1
; CHECK-NEXT: -->  {1,+,1}<nuw><%loop>
; CHECK:  %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64
; CHECK-NEXT:  -->  (sext i32 {1,+,1}<nuw><%loop> to i64)
entry:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ]
  %iv.inc.maywrap = add i32 %iv, 1
  %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64
  %cond0 = call i1 @use(i64 %iv.inc.maywrap.sext)
  br i1 %cond0, label %be, label %leave

be:
  %iv.inc.nowrap = add nsw i32 %iv, 1
  %be.cond = call i1 @use(i64 0) ;; Get an unanalyzable value
  br i1 %be.cond, label %loop, label %leave

leave:
  ret void
}