diff options
Diffstat (limited to 'gcc/config/v850/v850.c')
| -rw-r--r-- | gcc/config/v850/v850.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/gcc/config/v850/v850.c b/gcc/config/v850/v850.c index 8f8cd14..49b8e75 100644 --- a/gcc/config/v850/v850.c +++ b/gcc/config/v850/v850.c @@ -1,6 +1,6 @@ /* Subroutines for insn-output.c for NEC V850 series Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, - 2006, 2007, 2008, 2009 Free Software Foundation, Inc. + 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. Contributed by Jeff Law (law@cygnus.com). This file is part of GCC. @@ -50,6 +50,7 @@ /* Function prototypes for stupid compilers: */ static bool v850_handle_option (size_t, const char *, int); +static void v850_option_optimization (int, int); static void const_double_split (rtx, HOST_WIDE_INT *, HOST_WIDE_INT *); static int const_costs_int (HOST_WIDE_INT, int); static int const_costs (rtx, enum rtx_code); @@ -218,6 +219,9 @@ static const struct attribute_spec v850_attribute_table[] = #undef TARGET_STRICT_ARGUMENT_NAMING #define TARGET_STRICT_ARGUMENT_NAMING v850_strict_argument_naming +#undef TARGET_OPTION_OPTIMIZATION +#define TARGET_OPTION_OPTIMIZATION v850_option_optimization + struct gcc_target targetm = TARGET_INITIALIZER; /* Set the maximum size of small memory area TYPE to the value given @@ -279,6 +283,21 @@ v850_handle_option (size_t code, const char *arg, int value ATTRIBUTE_UNUSED) } } +/* Implement TARGET_OPTION_OPTIMIZATION. */ + +static void +v850_option_optimization (int level, int size ATTRIBUTE_UNUSED) +{ + if (level) + /* Note - we no longer enable MASK_EP when optimizing. This is + because of a hardware bug which stops the SLD and SST instructions + from correctly detecting some hazards. If the user is sure that + their hardware is fixed or that their program will not encounter + the conditions that trigger the bug then they can enable -mep by + hand. */ + target_flags |= MASK_PROLOG_FUNCTION; +} + /* Handle the TARGET_PASS_BY_REFERENCE target hook. Specify whether to pass the argument by reference. */ |