[llvm] r176490 - Add a test that .align directives on capable processors use long NOPs.

[Chad Rosier]

David,
This is failing for me locally with the following error:

/Users/mcrosier/llvm-clean/llvm/test/MC/X86/x86_long_nop.s:6:8: error: invalid alignment value
.align 32

Does the .align directive expect log base 2 of the byte alignment (i.e., .align 5)?

 Chad

On Mar 5, 2013, at 8:46 AM, David Sehr <sehr at google.com> wrote:

> Author: sehr
> Date: Tue Mar  5 10:46:54 2013
> New Revision: 176490
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=176490&view=rev
> Log:
> Add a test that .align directives on capable processors use long NOPs.
> 
> Added:
>    llvm/trunk/test/MC/X86/x86_long_nop.s
> 
> Added: llvm/trunk/test/MC/X86/x86_long_nop.s
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/X86/x86_long_nop.s?rev=176490&view=auto
> ==============================================================================
> --- llvm/trunk/test/MC/X86/x86_long_nop.s (added)
> +++ llvm/trunk/test/MC/X86/x86_long_nop.s Tue Mar  5 10:46:54 2013
> @@ -0,0 +1,12 @@
> +# RUN: llvm-mc -filetype=obj -arch=x86 -mcpu=i686 %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s
> +
> +# Ensure alignment directives also emit sequences of 15-byte NOPs on processors
> +# capable of using long NOPs.
> +inc %eax
> +.align 32
> +inc %eax
> +# CHECK: 0:  inc
> +# CHECK-NEXT: 1:  nop
> +# CHECK-NEXT: 10:  nop
> +# CHECK-NEXT: 1f:  nop
> +# CHECK-NEXT: 20:  inc
> 
> 
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