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(REG_ALLOC_ORDER): New macro.

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From-SVN: r7264
This commit is contained in:
Richard Kenner 1994-05-07 12:21:28 -04:00
parent b288f2b339
commit 184ff798d9
1 changed files with 10 additions and 0 deletions
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gcc/config/i386/i386.h
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@ -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 \
{ \