File: mul-masked-bits.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (19 lines) | stat: -rw-r--r-- 577 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
; NOTE: Assertions have been autogenerated by update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s

define i32 @foo(i32 %x, i32 %y) {
; CHECK-LABEL: @foo(
; CHECK-NEXT:    [[A:%.*]] = and i32 %x, 7
; CHECK-NEXT:    [[B:%.*]] = and i32 %y, 7
; CHECK-NEXT:    [[C:%.*]] = mul nuw nsw i32 [[A]], [[B]]
; CHECK-NEXT:    [[D:%.*]] = shl nuw i32 [[C]], 26
; CHECK-NEXT:    [[E:%.*]] = ashr exact i32 [[D]], 26
; CHECK-NEXT:    ret i32 [[E]]
;
  %a = and i32 %x, 7
  %b = and i32 %y, 7
  %c = mul i32 %a, %b
  %d = shl i32 %c, 26
  %e = ashr i32 %d, 26
  ret i32 %e
}