File: zext-shl.ll

package info (click to toggle)
llvm-2.7 2.7-6
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 59,992 kB
  • ctags: 49,499
  • sloc: cpp: 373,792; ansic: 16,885; sh: 12,614; asm: 6,809; ada: 3,083; ml: 2,942; python: 2,671; perl: 2,404; makefile: 1,691; pascal: 1,235; exp: 399; objc: 291; lisp: 184; csh: 117; xml: 38; f90: 36
file content (25 lines) | stat: -rw-r--r-- 461 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
20
21
22
23
24
25
; RUN: llc < %s -march=x86 | FileCheck %s

define i32 @t1(i8 zeroext %x) nounwind readnone ssp {
entry:
; CHECK: t1:
; CHECK: shll
; CHECK-NOT: movzwl
; CHECK: ret
  %0 = zext i8 %x to i16
  %1 = shl i16 %0, 5
  %2 = zext i16 %1 to i32
  ret i32 %2
}

define i32 @t2(i8 zeroext %x) nounwind readnone ssp {
entry:
; CHECK: t2:
; CHECK: shrl
; CHECK-NOT: movzwl
; CHECK: ret
  %0 = zext i8 %x to i16
  %1 = lshr i16 %0, 3
  %2 = zext i16 %1 to i32
  ret i32 %2
}