File: fast-isel-shift-materialize.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (25 lines) | stat: -rw-r--r-- 744 bytes parent folder | download | duplicates (30)
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 }