File: pr30454.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (32 lines) | stat: -rw-r--r-- 748 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 -passes='lcssa,loop-mssa(licm)' -S | FileCheck %s
; PR30454
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare i8 @bar()

; Test that we preserve LCSSA form when removing edges from unreachable blocks.
; CHECK-LABEL: @foo
define void @foo() {
entry:
  br label %for.cond

for.cond:
  %x = phi i8 [ undef, %entry ], [ %y, %for.latch ]
  br i1 undef, label %for.latch, label %exit

; CHECK:      unreachable.bb:
; CHECK-NEXT:   unreachable
unreachable.bb:
  br i1 undef, label %exit, label %for.latch

for.latch:
  %y = call i8 @bar()
  br label %for.cond

; CHECK:      exit:
; CHECK-NEXT:   %x.lcssa = phi i8 [ %x, %for.cond ]
exit:
  %z = zext i8 %x to i32
  ret void
}