File: opt-fneg.ll

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (38 lines) | stat: -rw-r--r-- 968 bytes parent folder | download | duplicates (6) 
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
28
29
30
31
32
33
34
35
36
37
38
 
; RUN: llc -mtriple=hexagon -mcpu=hexagonv5 < %s | FileCheck %s
; Optimize fneg to togglebit in V5.

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

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

define float @baz0(float %x) nounwind {
entry:
; CHECK-LABEL: baz0:
; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
  %conv1 = fmul nnan float %x, -1.000000e+00
  ret float %conv1
}

define float @baz1(float %x) nounwind {
entry:
  %not.nan = fadd nnan float %x, %x
; CHECK-LABEL: baz1:
; CHECK: r{{[0-9]+}} = togglebit(r{{[0-9]+}},#31)
  %conv1 = fmul float %not.nan, -1.000000e+00
  ret float %conv1
}