File: absorption.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (27 lines) | stat: -rw-r--r-- 719 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
23
24
25
26
27
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -reassociate < %s | FileCheck %s

; Check that if constants combine to an absorbing value then the expression is
; evaluated as the absorbing value.

define i8 @or_all_ones(i8 %x) {
; CHECK-LABEL: @or_all_ones(
; CHECK-NEXT:    ret i8 -1
;
  %tmp1 = or i8 %x, 127
  %tmp2 = or i8 %tmp1, 128
  ret i8 %tmp2
}

; TODO: fmul by 0.0 with nsz+nnan should have simplified to 0.0.

define double @fmul_zero(double %x) {
; CHECK-LABEL: @fmul_zero(
; CHECK-NEXT:    [[R:%.*]] = fmul fast double [[X:%.*]], 0.000000e+00
; CHECK-NEXT:    ret double [[R]]
;
  %x4 = fmul fast double %x, 4.0
  %r = fmul fast double %x4, 0.0
  ret double %r
}