diff options
Diffstat (limited to 'gcc/regclass.c')
| -rw-r--r-- | gcc/regclass.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/gcc/regclass.c b/gcc/regclass.c index 58399dd4041..cd5b0d00259 100644 --- a/gcc/regclass.c +++ b/gcc/regclass.c @@ -103,7 +103,17 @@ int reg_alloc_order[FIRST_PSEUDO_REGISTER] = REG_ALLOC_ORDER; /* For each reg class, a HARD_REG_SET saying which registers are in it. */ -HARD_REG_SET reg_class_contents[] = REG_CLASS_CONTENTS; +HARD_REG_SET reg_class_contents[N_REG_CLASSES]; + +/* The same information, but as an array of ints. We copy from these + ints to the table above. This is done so that the tm.h files do + not have to be aware of the wordsize for machines with <= 64 regs. */ + +#define N_REG_INTS \ + ((FIRST_PSEUDO_REGISTER + (HOST_BITS_PER_INT - 1)) / HOST_BITS_PER_INT) + +static int int_reg_class_contents[N_REG_CLASSES][N_REG_INTS] + = REG_CLASS_CONTENTS; /* For each reg class, number of regs it contains. */ @@ -158,6 +168,19 @@ init_reg_sets () { register int i, j; + /* First copy the register information from the initial int form into + the regsets. */ + + for (i = 0; i < N_REG_CLASSES; i++) + { + CLEAR_HARD_REG_SET (reg_class_contents[i]); + + for (j = 0; j < FIRST_PSEUDO_REGISTER; j++) + if (int_reg_class_contents[i][j / HOST_BITS_PER_INT] + & (1 << (j % HOST_BITS_PER_INT))) + SET_HARD_REG_BIT (reg_class_contents[i], j); + } + bcopy (initial_fixed_regs, fixed_regs, sizeof fixed_regs); bcopy (initial_call_used_regs, call_used_regs, sizeof call_used_regs); bzero (global_regs, sizeof global_regs); |