llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-14 02:33:53 +00:00

History

Chris Lattner 9637d5b22e Teach X86ISelLowering that the second result of X86ISD::UMUL is a flags

result.  This allows us to compile:

void *test12(long count) {
      return new int[count];
}

into:

test12:
	movl	$4, %ecx
	movq	%rdi, %rax
	mulq	%rcx
	movq	$-1, %rdi
	cmovnoq	%rax, %rdi
	jmp	__Znam                  ## TAILCALL

instead of:

test12:
	movl	$4, %ecx
	movq	%rdi, %rax
	mulq	%rcx
	seto	%cl
	testb	%cl, %cl
	movq	$-1, %rdi
	cmoveq	%rax, %rdi
	jmp	__Znam

Of course it would be even better if the regalloc inverted the cmov to 'cmovoq',
which would eliminate the need for the 'movq %rdi, %rax'.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120936 91177308-0d34-0410-b5e6-96231b3b80d8

2010-12-05 07:49:54 +00:00

Analysis

Also inore '()' while creating mdnode name from ObjC symbol name.

2010-12-03 23:40:45 +00:00