File: 2011-02-14-InfLoop.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (19 lines) | stat: -rw-r--r-- 819 bytes parent folder | download | duplicates (27) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
; This testcase causes an infinite loop in the instruction combiner,
; because it changes a pattern and the original pattern is almost
; identical to the newly-generated pattern.
; RUN: opt < %s -instcombine -disable-output

;PR PR9216

target triple = "x86_64-unknown-linux-gnu"

define <4 x float> @m_387(i8* noalias nocapture %A, i8* nocapture %B, <4 x i1> %C) nounwind {
entry:
  %movcsext20 = sext <4 x i1> %C to <4 x i32>
  %tmp2389 = xor <4 x i32> %movcsext20, <i32 -1, i32 -1, i32 -1, i32 -1>
  %movcand25 = and <4 x i32> %tmp2389, <i32 undef, i32 undef, i32 undef, i32 -1>
  %movcor26 = or <4 x i32> %movcand25, zeroinitializer
  %L2 = bitcast <4 x i32> %movcor26 to <4 x float>
  %L3 = shufflevector <4 x float> zeroinitializer, <4 x float> %L2, <4 x i32> <i32 0, i32 1, i32 2, i32 7>
  ret <4 x float> %L3
}