File: udiv-pow2-vscale-inseltpoison.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 (27 lines) | stat: -rw-r--r-- 1,090 bytes parent folder | download | duplicates (6) 
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
 
; RUN: opt -instcombine -S < %s | FileCheck %s

; This vscale udiv with a power-of-2 spalt on the rhs should not crash opt

; CHECK: define <vscale x 2 x i32> @udiv_pow2_vscale(<vscale x 2 x i32> %lhs)
define <vscale x 2 x i32> @udiv_pow2_vscale(<vscale x 2 x i32> %lhs) {
  %splatter = insertelement <vscale x 2 x i32> poison, i32 2, i32 0
  %rhs = shufflevector <vscale x 2 x i32> %splatter,
                       <vscale x 2 x i32> undef,
                       <vscale x 2 x i32> zeroinitializer
  %res = udiv <vscale x 2 x i32> %lhs, %rhs
  ret <vscale x 2 x i32> %res
}

; This fixed width udiv with a power-of-2 splat on the rhs should also not
; crash, and instcombine should eliminate the udiv

; CHECK-LABEL: define <2 x i32> @udiv_pow2_fixed(<2 x i32> %lhs)
; CHECK-NOT: udiv
define <2 x i32> @udiv_pow2_fixed(<2 x i32> %lhs) {
  %splatter = insertelement <2 x i32> poison, i32 2, i32 0
  %rhs = shufflevector <2 x i32> %splatter,
                       <2 x i32> undef,
                       <2 x i32> zeroinitializer
  %res = udiv <2 x i32> %lhs, %rhs
  ret <2 x i32> %res
}