File: 2011-12-8-bitcastintprom.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 (22 lines) | stat: -rw-r--r-- 762 bytes parent folder | download | duplicates (13) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+sse2 | FileCheck %s --check-prefix=SSE2
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+sse4.1 | FileCheck %s --check-prefix=SSE41

; Make sure that the conversion between v4i8 to v2i16 is not a simple bitcast.
define void @prom_bug(<4 x i8> %t, ptr %p) {
; SSE2-LABEL: prom_bug:
; SSE2:       ## %bb.0:
; SSE2-NEXT:    movd %xmm0, %eax
; SSE2-NEXT:    movw %ax, (%rdi)
; SSE2-NEXT:    retq
;
; SSE41-LABEL: prom_bug:
; SSE41:       ## %bb.0:
; SSE41-NEXT:    pextrw $0, %xmm0, (%rdi)
; SSE41-NEXT:    retq
  %r = bitcast <4 x i8> %t to <2 x i16>
  %o = extractelement <2 x i16> %r, i32 0
  store i16 %o, ptr %p
  ret void
}