diff options
Diffstat (limited to 'gcc/calls.c')
| -rw-r--r-- | gcc/calls.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index eb54aee2d8a..d0f3a14038a 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -59,6 +59,10 @@ Boston, MA 02111-1307, USA. */ #define PUSH_ARGS_REVERSED 0 #endif +#ifndef STACK_POINTER_OFFSET +#define STACK_POINTER_OFFSET 0 +#endif + /* Like PREFERRED_STACK_BOUNDARY but in units of bytes, not bits. */ #define STACK_BYTES (PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT) @@ -3820,11 +3824,15 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p) highest_outgoing_arg_in_use - initial_highest_arg_in_use); needed = 0; - /* The address of the outgoing argument list must not be copied to a - register here, because argblock would be left pointing to the - wrong place after the call to allocate_dynamic_stack_space below. */ + /* We must be careful to use virtual regs before they're instantiated, + and real regs afterwards. Loop optimization, for example, can create + new libcalls after we've instantiated the virtual regs, and if we + use virtuals anyway, they won't match the rtl patterns. */ - argblock = virtual_outgoing_args_rtx; + if (virtuals_instantiated) + argblock = plus_constant (stack_pointer_rtx, STACK_POINTER_OFFSET); + else + argblock = virtual_outgoing_args_rtx; } else { |