diff options
Diffstat (limited to 'gcc/rtl.def')
| -rw-r--r-- | gcc/rtl.def | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/gcc/rtl.def b/gcc/rtl.def index a411ce36ea8..8977400a585 100644 --- a/gcc/rtl.def +++ b/gcc/rtl.def @@ -1,7 +1,7 @@ /* This file contains the definitions and documentation for the Register Transfer Expressions (rtx's) that make up the Register Transfer Language (rtl) used in the Back End of the GNU compiler. - Copyright (C) 1987, 88, 92, 94, 95, 97, 1998 Free Software Foundation, Inc. + Copyright (C) 1987, 88, 92, 94, 95, 97, 98, 1999 Free Software Foundation, Inc. This file is part of GNU CC. @@ -723,6 +723,14 @@ DEF_RTL_EXPR(PRE_INC, "pre_inc", "e", 'x') DEF_RTL_EXPR(POST_DEC, "post_dec", "e", 'x') DEF_RTL_EXPR(POST_INC, "post_inc", "e", 'x') +/* These binary operations are used to represent generic address + side-effects in memory addresses, except for simple incrementation + or decrementation which use the above operations. They are + created automatically by the life_analysis pass in flow.c. + (Note that these operators are currently placeholders.) */ +DEF_RTL_EXPR(PRE_MODIFY, "pre_modify", "ee", 'x') +DEF_RTL_EXPR(POST_MODIFY, "post_modify", "ee", 'x') + /* Comparison operations. The ordered comparisons exist in two flavors, signed and unsigned. */ DEF_RTL_EXPR(NE, "ne", "ee", '<') @@ -847,6 +855,24 @@ DEF_RTL_EXPR(RANGE_LIVE, "range_live", "bi", 'x') eliminated by the first CSE pass. */ DEF_RTL_EXPR(CONSTANT_P_RTX, "constant_p_rtx", "e", 'x') +/* A placeholder for a CALL_INSN which may be turned into a normal call, + a sibling (tail) call or tail recursion. + + Immediately after RTL generation, this placeholder will be replaced + by the insns to perform the call, sibcall or tail recursion. + + This RTX has 4 operands. The first three are lists of instructions to + perform the call as a normal call, sibling call and tail recursion + respectively. The latter two lists may be NULL, the first may never + be NULL. + + The last operand is the tail recursion CODE_LABEL, which may be NULL if no + potential tail recursive calls were found. + + The tail recursion label is needed so that we can clear LABEL_PRESERVE_P + after we select a call method. */ +DEF_RTL_EXPR(CALL_PLACEHOLDER, "call_placeholder", "uuuu", 'x') + /* Local variables: mode:c |