File: constant-hoisting-and.ll

package info (click to toggle)
llvm-toolchain-4.0 1%3A4.0.1-10~deb9u2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 493,332 kB
  • sloc: cpp: 2,698,100; ansic: 552,773; asm: 128,821; python: 121,589; objc: 105,054; sh: 21,174; lisp: 6,758; ml: 5,532; perl: 5,311; pascal: 5,245; makefile: 2,083; cs: 1,868; xml: 686; php: 212; csh: 117
file content (19 lines) | stat: -rw-r--r-- 519 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
; RUN: llc < %s -O3 -march=x86-64 |FileCheck %s
define i64 @foo(i1 %z, i64 %data1, i64 %data2)
{
; If constant 4294967294 is hoisted to a variable, then we won't be able to use
; the implicit zero extension of 32-bit operations to handle the AND.
entry:
  %val1 = and i64 %data1, 4294967294
  br i1 %z, label %End, label %L_val2

; CHECK: andl    $-2, {{.*}}
; CHECK: andl    $-2, {{.*}}
L_val2:
  %val2 = and i64 %data2, 4294967294
  br label %End

End:
  %p1 = phi i64 [%val1,%entry], [%val2,%L_val2]
  ret i64 %p1
}