File: fast-isel-double-half-convertion.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 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 (23 lines) | stat: -rw-r--r-- 690 bytes parent folder | download | duplicates (35)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
; RUN: llc -fast-isel -fast-isel-abort=1 -mtriple=x86_64-unknown-unknown -mattr=+f16c < %s

; XFAIL: *

; In the future, we might want to teach fast-isel how to expand a double-to-half
; conversion into a double-to-float conversion immediately followed by a
; float-to-half conversion. For now, fast-isel is expected to fail.

define double @test_fp16_to_fp64(i32 %a) {
entry:
  %0 = trunc i32 %a to i16
  %1 = call double @llvm.convert.from.fp16.f64(i16 %0)
  ret float %0
}

define i16 @test_fp64_to_fp16(double %a) {
entry:
  %0 = call i16 @llvm.convert.to.fp16.f64(double %a)
  ret i16 %0
}

declare i16 @llvm.convert.to.fp16.f64(double)
declare double @llvm.convert.from.fp16.f64(i16)