[LLVMdev] X86TarIgetLowering::LowerToBT

[Stephen Canon]

No, because it uses the 32b form “testl”.

– Steve

> On Jan 23, 2015, at 1:27 PM, Chris Sears <chris.sears at gmail.com> wrote:
> 
> Is that a bug in the current clang then?
> 
> 	.globl	_IsBitSet31
> 	.align	4, 0x90
> _IsBitSet31:                            ## @IsBitSet31
> 	.cfi_startproc
> ## BB#0:
> 	pushq	%rbp
> Ltmp157:
> 	.cfi_def_cfa_offset 16
> Ltmp158:
> 	.cfi_offset %rbp, -16
> 	movq	%rsp, %rbp
> Ltmp159:
> 	.cfi_def_cfa_register %rbp
> 	movl	$42, %ecx
> 	subq	%rdi, %rcx
> 	leaq	47(%rdi), %rax
> 	testl	$-2147483648, %edi      ## imm = 0xFFFFFFFF80000000
> 	cmoveq	%rcx, %rax
> 	popq	%rbp
> 	retq
>