diff options
Diffstat (limited to 'gcc/config/i386/i386.c')
| -rw-r--r-- | gcc/config/i386/i386.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 095ba17..ef5b7a9 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -3203,9 +3203,9 @@ ix86_function_regparm (const_tree type, const_tree decl) struct function *f; /* Make sure no regparm register is taken by a - fixed register or global register variable. */ - for (local_regparm = 0; local_regparm < 3; local_regparm++) - if (global_regs[local_regparm] || fixed_regs[local_regparm]) + fixed register variable. */ + for (local_regparm = 0; local_regparm < REGPARM_MAX; local_regparm++) + if (fixed_regs[local_regparm]) break; /* We can't use regparm(3) for nested functions as these use @@ -3227,13 +3227,14 @@ ix86_function_regparm (const_tree type, const_tree decl) TYPE_ATTRIBUTES (TREE_TYPE (decl))))) local_regparm = 2; - /* Each global register variable or fixed register usage - increases register pressure, so less registers should be - used for argument passing. This functionality can be - overriden by explicit regparm value. */ - for (regno = 0; regno < 6; regno++) - if (global_regs[regno] || fixed_regs[regno]) + /* Each fixed register usage increases register pressure, + so less registers should be used for argument passing. + This functionality can be overriden by an explicit + regparm value. */ + for (regno = 0; regno <= DI_REG; regno++) + if (fixed_regs[regno]) globals++; + local_regparm = globals < local_regparm ? local_regparm - globals : 0; @@ -15108,8 +15109,9 @@ decide_alg (HOST_WIDE_INT count, HOST_WIDE_INT expected_size, bool memset, additionally, memset wants eax and memcpy wants esi. Don't consider such algorithms if the user has appropriated those registers for their own purposes. */ - bool rep_prefix_usable = !(global_regs[CX_REG] || global_regs[DI_REG] - || (memset ? global_regs[AX_REG] : global_regs[SI_REG])); + bool rep_prefix_usable = !(fixed_regs[CX_REG] || fixed_regs[DI_REG] + || (memset + ? fixed_regs[AX_REG] : fixed_regs[SI_REG])); #define ALG_USABLE_P(alg) (rep_prefix_usable \ || (alg != rep_prefix_1_byte \ @@ -16084,7 +16086,7 @@ ix86_expand_strlen (rtx out, rtx src, rtx eoschar, rtx align) rtx unspec; /* Can't use this if the user has appropriated eax, ecx, or edi. */ - if (global_regs[AX_REG] || global_regs[CX_REG] || global_regs[DI_REG]) + if (fixed_regs[AX_REG] || fixed_regs[CX_REG] || fixed_regs[DI_REG]) return false; scratch2 = gen_reg_rtx (Pmode); |