File: opt-fneg.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2~deb10u1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 995,836 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (26 lines) | stat: -rw-r--r-- 683 bytes parent folder | download | duplicates (11) 
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
 
; RUN: llc -march=hexagon -mcpu=hexagonv5 < %s | FileCheck %s
; Optimize fneg to togglebit in V5.

define float @foo(float %x) nounwind {
entry:
; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
  %x.addr = alloca float, align 4
  store float %x, float* %x.addr, align 4
  %0 = load float, float* %x.addr, align 4
  %sub = fsub float -0.000000e+00, %0
  ret float %sub
}

define float @bar(float %x) nounwind {
entry:
; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
  %sub = fsub float -0.000000e+00, %x
  ret float %sub
}

define float @baz(float %x) nounwind {
entry:
; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
  %conv1 = fmul float %x, -1.000000e+00
  ret float %conv1
}