File: arm64-fp-contract-zero.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
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
}