File: pr44541.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (24 lines) | stat: -rw-r--r-- 726 bytes parent folder | download | duplicates (3) 
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:    [[TMP1:%.*]] = call i16 @llvm.smax.i16(i16 [[ARG:%.*]], i16 0)
; CHECK-NEXT:    ret i16 [[TMP1]]
;
  %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
}