File: shr-exact-demanded-bits.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (35 lines) | stat: -rw-r--r-- 1,349 bytes parent folder | download | duplicates (7)
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
31
32
33
34
35
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s | FileCheck %s
target triple = "aarch64-linux"

define <2 x i32> @f(i8  %0, i8  %1) {
; CHECK-LABEL: f:
; CHECK:       // %bb.0:
; CHECK-NEXT:    movi v0.2d, #0000000000000000
; CHECK-NEXT:    mov v0.b[3], w0
; CHECK-NEXT:    mov v0.b[7], w1
; CHECK-NEXT:    sshr v0.2s, v0.2s, #24
; CHECK-NEXT:    ret
  %3 = insertelement <2 x i8> poison, i8 %0, i64 0
  %4 = insertelement <2 x i8> %3, i8 %1, i64 1
  %5 = shufflevector <2 x i8> %4, <2 x i8> <i8 0, i8 poison>, <8 x i32> <i32 2, i32 2, i32 2, i32 0, i32 2, i32 2, i32 2, i32 1>
  %6 = bitcast <8 x i8> %5 to <2 x i32>
  %7 = ashr exact <2 x i32> %6, <i32 24, i32 24>
  ret <2 x i32> %7
}

define <2 x i32> @g(i8  %0, i8  %1) {
; CHECK-LABEL: g:
; CHECK:       // %bb.0:
; CHECK-NEXT:    movi v0.2d, #0000000000000000
; CHECK-NEXT:    mov v0.b[3], w0
; CHECK-NEXT:    mov v0.b[7], w1
; CHECK-NEXT:    ushr v0.2s, v0.2s, #24
; CHECK-NEXT:    ret
  %3 = insertelement <2 x i8> poison, i8 %0, i64 0
  %4 = insertelement <2 x i8> %3, i8 %1, i64 1
  %5 = shufflevector <2 x i8> %4, <2 x i8> <i8 0, i8 poison>, <8 x i32> <i32 2, i32 2, i32 2, i32 0, i32 2, i32 2, i32 2, i32 1>
  %6 = bitcast <8 x i8> %5 to <2 x i32>
  %7 = lshr exact <2 x i32> %6, <i32 24, i32 24>
  ret <2 x i32> %7
}