File: fast-isel-shift-materialize.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (25 lines) | stat: -rw-r--r-- 744 bytes parent folder | download | duplicates (28)
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
; RUN: llc %s -o - -verify-machineinstrs -fast-isel=true | FileCheck %s

target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
target triple = "thumbv7-apple-ios8.0.0"

; When materializing the '2' for the shifts below, the second shift kills the vreg
; we materialize in to.  However, the first shift was also killing that vreg.
; This fails the machine verifier because the second use then thinks its reading an
; undefined register.

; CHECK: lsr.w
; CHECK: lsr.w

declare void @foo(i32, i32)

; Function Attrs: minsize
define i32 @test(i32 %tmp3, i32 %tmp9) #0 {
bb:
  %tmp4 = lshr i32 %tmp3, 2
  %tmp10 = lshr i32 %tmp9, 2
  call void @foo(i32 %tmp10, i32 %tmp4)
  ret i32 undef
}

attributes #0 = { minsize }