[cfe-dev] disabling loop idiom recognizer in clang

[Damjan Marion]

On Apr 29, 2011, at 12:15 AM, Chris Lattner wrote:

> 
> On Apr 28, 2011, at 3:09 PM, Damjan Marion wrote:
> 
>> 
>> Hi,
>> 
>> is there a way to disable loop idiom recognizer in clang?
>> 
>> I have a problem with compiling early stage code for ARM architecture which should not be linked to external libraries but clang replaces loop with memset call in the code.
> 
> Yep, build with -fno-builtin or -ffreestanding.

It doesn't work. According to gcc docs (which clang probably follows): 
"GCC requires the freestanding environment provide memcpy, memmove, memset and memcmp."