File: add.ll

package info (click to toggle)
llvm-toolchain-21 1%3A21.1.6-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,245,028 kB
  • sloc: cpp: 7,619,726; ansic: 1,434,018; asm: 1,058,748; python: 252,740; f90: 94,671; objc: 70,685; lisp: 42,813; pascal: 18,401; sh: 8,601; ml: 5,111; perl: 4,720; makefile: 3,675; awk: 3,523; javascript: 2,409; xml: 892; fortran: 770
file content (22 lines) | stat: -rw-r--r-- 920 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
; RUN: opt -S -disable-output -passes="print<demanded-bits>" < %s 2>&1 | FileCheck %s

; CHECK-LABEL: Printing analysis 'Demanded Bits Analysis' for function 'test_add':
; CHECK-DAG: DemandedBits: 0x1e for   %1 = and i32 %a, 9
; CHECK-DAG: DemandedBits: 0x1a for   %2 = and i32 %b, 9
; CHECK-DAG: DemandedBits: 0x1a for   %3 = and i32 %c, 13
; CHECK-DAG: DemandedBits: 0x1a for   %4 = and i32 %d, 4
; CHECK-DAG: DemandedBits: 0x1a for   %5 = or i32 %2, %3
; CHECK-DAG: DemandedBits: 0x1a for   %6 = or i32 %4, %5
; CHECK-DAG: DemandedBits: 0x10 for   %7 = add i32 %1, %6
; CHECK-DAG: DemandedBits: 0xffffffff for   %8 = and i32 %7, 16
define i32 @test_add(i32 %a, i32 %b, i32 %c, i32 %d) {
  %1 = and i32 %a, 9
  %2 = and i32 %b, 9
  %3 = and i32 %c, 13
  %4 = and i32 %d, 4 ; no bit of %d alive, %4 simplifies to zero
  %5 = or i32 %2, %3
  %6 = or i32 %4, %5
  %7 = add i32 %1, %6
  %8 = and i32 %7, 16
  ret i32 %8
}