File: pr44541.ll

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (24 lines) | stat: -rw-r--r-- 724 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=instcombine -instcombine-infinite-loop-threshold=2 < %s | FileCheck %s

; This test used to cause an infinite combine loop.

define i16 @passthru(i16 returned %x) {
; CHECK-LABEL: @passthru(
; CHECK-NEXT:    ret i16 [[X:%.*]]
;
  ret i16 %x
}

define i16 @test(i16 %arg) {
; CHECK-LABEL: @test(
; CHECK-NEXT:    [[ZERO:%.*]] = call i16 @passthru(i16 0)
; CHECK-NEXT:    [[RET:%.*]] = call i16 @llvm.smax.i16(i16 [[ARG:%.*]], i16 0)
; CHECK-NEXT:    ret i16 [[RET]]
;
  %zero = call i16 @passthru(i16 0)
  %sub = sub nuw nsw i16 %arg, %zero
  %cmp = icmp slt i16 %sub, 0
  %ret = select i1 %cmp, i16 0, i16 %sub
  ret i16 %ret
}