File: pr24952.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (27 lines) | stat: -rw-r--r-- 564 bytes parent folder | download | duplicates (12) 
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
 
; RUN: opt -passes=indvars -S < %s | FileCheck %s

declare void @use(i1)

define void @f() {
; CHECK-LABEL: @f(
 entry:
  %x = alloca i32
  %y = alloca i32
  br label %loop

 loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
  %iv.inc = add i32 %iv, 1

  %x.gep = getelementptr i32, ptr %x, i32 %iv
  %eql = icmp eq ptr %x.gep, %y
; CHECK-NOT: @use(i1 true)
  call void @use(i1 %eql)

  ; %be.cond deliberately 'false' -- we want want the trip count to be 0.
  %be.cond = icmp ult i32 %iv, 0
  br i1 %be.cond, label %loop, label %leave

 leave:
  ret void
}