mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-15 20:06:46 +00:00
a73b6fc511
x == -y --> x+y == 0 x != -y --> x+y != 0 On x86, the generated code goes from negl %esi cmpl %esi, %edi je .LBB0_2 to addl %esi, %edi je .L4 This case is correctly handled for ARM with "cmn". Patch by Manman Ren. rdar://11245199 PR12545 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155739 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
502 B
LLVM
23 lines
502 B
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
|
|
|
|
; rdar://11245199
|
|
; PR12545
|
|
define void @f(i32 %x, i32 %y) nounwind uwtable ssp {
|
|
entry:
|
|
; CHECK: f:
|
|
; CHECK-NOT: neg
|
|
; CHECK: add
|
|
%sub = sub i32 0, %y
|
|
%cmp = icmp eq i32 %x, %sub
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry
|
|
tail call void @g() nounwind
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
declare void @g()
|