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| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-05-07 12:21:28 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-05-07 12:21:28 -0400 |
| commit | 184ff798d97ce43b1666b4b1e568f62ec61d5219 (patch) | |
| tree | 1cebebd0de8162c9c815eada580ff8a8e6c97cd6 | |
| parent | b288f2b3393ffdce4b2b9b70203d1804d202c529 (diff) | |
| download | gcc-184ff798d97ce43b1666b4b1e568f62ec61d5219.zip gcc-184ff798d97ce43b1666b4b1e568f62ec61d5219.tar.gz gcc-184ff798d97ce43b1666b4b1e568f62ec61d5219.tar.bz2 | |
(REG_ALLOC_ORDER): New macro.
From-SVN: r7264
| -rw-r--r-- | gcc/config/i386/i386.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index 828a8f7..b69604b 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -259,6 +259,16 @@ extern int target_flags; /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7,arg*/ \ { 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 } +/* Order in which to allocate registers. First allocate registers + for which no insn operand demands that register, next those that are + demanded by the least number of insns. List frame pointer late and fixed + egisters last. Note that, in general, we want to put nonsaved registers + late, but we put bx relatively early since it is not demanded by + any insn operand. */ +#define REG_ALLOC_ORDER \ +/*si,di,bx,cx,dx,ax,bp,sp,st,st1,st2,st3,st4,st5,st6,st7,arg*/ \ +{ 4, 5, 3, 2, 1, 0, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16} + /* Macro to conditionally modify fixed_regs/call_used_regs. */ #define CONDITIONAL_REGISTER_USAGE \ { \ |