File: 2012-05-17-TwoAddressBug.ll

package info (click to toggle)
llvm-toolchain-3.5 1%3A3.5.2-3~bpo8%2B2
  • links: PTS, VCS
  • area: main
  • in suites: jessie-backports
  • size: 283,276 kB
  • sloc: cpp: 1,884,580; ansic: 310,787; objc: 86,612; python: 79,608; asm: 65,866; sh: 9,829; makefile: 6,068; perl: 5,589; ml: 5,254; pascal: 3,285; lisp: 1,640; xml: 686; cs: 239; csh: 117
file content (16 lines) | stat: -rw-r--r-- 544 bytes parent folder | download | duplicates (40)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
; RUN: llc < %s -mtriple=x86_64-apple-macosx -pre-RA-sched=source | FileCheck %s

; Teach two-address pass to update the "source" map so it doesn't perform a
; non-profitable commute using outdated info. The test case would still fail
; because of poor pre-RA schedule. That will be fixed by MI scheduler.
; rdar://11472010
define i32 @t(i32 %mask) nounwind readnone ssp {
entry:
; CHECK-LABEL: t:
; CHECK-NOT: mov
  %sub = add i32 %mask, -65535
  %shr = lshr i32 %sub, 23
  %and = and i32 %mask, 1
  %add = add i32 %shr, %and
  ret i32 %add
}