On Wed, 2011-03-23 at 16:46 +0100, Bernd Schmidt wrote: > I've discovered a problem with -mlong-calls on ARM. The bug was first > reported against a new target, but I'd copied the relevant code from the > ARM backend. > > We use current_function_section in arm_is_long_call_p to decide whether > we're calling something that goes into the same section. The problem > with this is that current_function_section can only be used during > final, since it relies on the global variable in_cold_section_p which is > set up only in assemble_start_function. On ARM, this problem manifests > as short-calls when a long-call would be required; in the other port it > was an "insn doesn't satisfy its constraints" error. > > The following patch is against 4.5, since the problem appears hidden in > mainline (the initialization of first_function_block_is_cold has > changed). Ok for trunk and branches after arm-linux tests complete? > > > Bernd
The ARM port currently doesn't support hot/cold partitioning of code (and can't until the constant pool code is rewritten to deal with it), so how is this a problem? R.
