File: arm64-fp-contract-zero.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (18 lines) | stat: -rw-r--r-- 684 bytes parent folder | download | duplicates (18) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=arm64 -fp-contract=fast -o - %s | FileCheck %s


; Make sure we don't try to fold an fneg into +0.0, creating an illegal constant
; -0.0. It's also good, though not essential, that we don't resort to a litpool.
define double @test_fms_fold(double %a, double %b) {
; CHECK-LABEL: test_fms_fold:
; CHECK:       // %bb.0:
; CHECK-NEXT:    movi d2, #0000000000000000
; CHECK-NEXT:    fmul d1, d1, d2
; CHECK-NEXT:    fnmsub d0, d0, d2, d1
; CHECK-NEXT:    ret
  %mul = fmul double %a, 0.000000e+00
  %mul1 = fmul double %b, 0.000000e+00
  %sub = fsub double %mul, %mul1
  ret double %sub
}