forked from OSchip/llvm-project
26 lines
896 B
LLVM
26 lines
896 B
LLVM
; 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
|
|
}
|