File: partial-fold32.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 (25 lines) | stat: -rw-r--r-- 896 bytes parent folder | download | duplicates (30) 
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
 
; RUN: llc -mtriple=i686-unknown-linux-gnu -enable-misched=false < %s | FileCheck %s

define fastcc i8 @fold32to8(i32 %add, i8 %spill) {
; CHECK-LABEL: fold32to8:
; CHECK:    movl %ecx, (%esp) # 4-byte Spill
; CHECK:    subb (%esp), %dl  # 1-byte Folded Reload
entry:
  tail call void asm sideeffect "", "~{eax},~{ebx},~{ecx},~{edi},~{esi},~{ebp},~{dirflag},~{fpsr},~{flags}"()
  %trunc = trunc i32 %add to i8
  %sub = sub i8 %spill, %trunc
  ret i8 %sub
}

; Do not fold a 1-byte store into a 4-byte spill slot
define fastcc i8 @nofold(i32 %add, i8 %spill) {
; CHECK-LABEL: nofold:
; CHECK:    movl %edx, (%esp) # 4-byte Spill
; CHECK:    movl (%esp), %eax # 4-byte Reload
; CHECK:    subb %cl, %al
entry:
  tail call void asm sideeffect "", "~{eax},~{ebx},~{edx},~{edi},~{esi},~{ebp},~{dirflag},~{fpsr},~{flags}"()
  %trunc = trunc i32 %add to i8
  %sub = sub i8 %spill, %trunc
  ret i8 %sub
}