File: unreachable-loop-sinking.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 (30 lines) | stat: -rw-r--r-- 1,137 bytes parent folder | download | duplicates (13) 
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
 
; RUN: llc < %s
; PR6777

; MachineSink shouldn't try to sink code in unreachable blocks, as it's
; not worthwhile, and there are corner cases which it doesn't handle.

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-unknown-linux-gnu"

define double @fn1(ptr %arg, i64 %arg1) {
Entry:
  br i1 undef, label %Body, label %Exit

Exit:                                             ; preds = %Brancher7, %Entry
  ret double undef

Body:                                             ; preds = %Entry
  br i1 false, label %Brancher7, label %Body3

Body3:                                            ; preds = %Body6, %Body3, %Body
  br label %Body3

Body6:                                            ; preds = %Brancher7
  %tmp = fcmp oeq double 0xC04FBB2E40000000, undef ; <i1> [#uses=1]
  br i1 %tmp, label %Body3, label %Brancher7

Brancher7:                                        ; preds = %Body6, %Body
  %tmp2 = icmp ult i32 undef, 10                  ; <i1> [#uses=1]
  br i1 %tmp2, label %Body6, label %Exit
}