File: zext-bitperm.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 (23 lines) | stat: -rw-r--r-- 839 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc-unknown-linux-gnu | FileCheck %s
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s

; Test case for PPCTargetLowering::extendSubTreeForBitPermutation.
; We expect mask and rotate are folded into a rlwinm instruction.

define zeroext i32 @func(i32* %p, i32 zeroext %i) {
; CHECK-LABEL: @func
; CHECK: addi [[REG1:[0-9]+]], 4, 1
; CHECK: rlwinm [[REG2:[0-9]+]], [[REG1]], 2, 22, 29
; CHECK-NOT: sldi
; CHECK: lwzx 3, 3, [[REG2]]
; CHECK: blr
entry:
  %add = add i32 %i, 1
  %and = and i32 %add, 255
  %idxprom = zext i32 %and to i64
  %arrayidx = getelementptr inbounds i32, i32* %p, i64 %idxprom
  %0 = load i32, i32* %arrayidx, align 4
  ret i32 %0
}