File: pr26682.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (32 lines) | stat: -rw-r--r-- 852 bytes parent folder | download | duplicates (11) 
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
 
; RUN: opt < %s -lcssa -loop-simplify -indvars -S | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-unknown"

@a = external global i32, align 4

; Check that loop-simplify merges two loop exits, but preserves LCSSA form.
; CHECK-LABEL: @foo
; CHECK: for:
; CHECK: %or.cond = and i1 %cmp1, %cmp2
; CHECK-NOT: for.cond:
; CHECK: for.end:
; CHECK: %a.lcssa = phi i32 [ %a, %for ]
define i32 @foo(i32 %x) {
entry:
  br label %for

for:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %for.cond ]
  %cmp1 = icmp eq i32 %x, 0
  %iv.next = add nuw nsw i32 %iv, 1
  %a = load i32, i32* @a
  br i1 %cmp1, label %for.cond, label %for.end

for.cond:
  %cmp2 = icmp slt i32 %iv.next, 4
  br i1 %cmp2, label %for, label %for.end

for.end:
  %a.lcssa = phi i32 [ %a, %for ], [ %a, %for.cond ]
  ret i32 %a.lcssa
}