[llvm-commits] [PATCH] optimization of x == -y for X86

[Jay Foad]

On 27 April 2012 19:12, manman ren <mren at apple.com> wrote:
>
> This patch optimizes codegen for if(x==-y) on x86
> from
>    negl    %esi
>    cmpl    %esi, %edi
>    je    .LBB0_2
> to
>    addl    %esi, %edi
>    je    .L4

> Index: test/CodeGen/X86/neg_cmp.ll
> ===================================================================
> --- test/CodeGen/X86/neg_cmp.ll	(revision 0)
> +++ test/CodeGen/X86/neg_cmp.ll	(revision 0)
> @@ -0,0 +1,21 @@
> +; RUN: llc < %s -march=x86-64 | FileCheck %s
> +
> +; rdar://11245199

Can you mention PR 12545 please? I don't think I have access to rdar:// (do I?).

Thanks for fixing it!

Jay.