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gcse.c (hash_scan_insn): New argument IN_LIBCALL_BLOCK. 

* gcse.c (hash_scan_insn): New argument IN_LIBCALL_BLOCK.  Changed
        caller.

From-SVN: r20967
This commit is contained in:
J"orn Rennecke 1998-07-06 21:50:50 +00:00 committed by Jeff Law
parent fcc60894b8
commit ed79bb3d42
2 changed files with 20 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Mon Jul 6 22:47:55 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* gcse.c (hash_scan_insn): New argument IN_LIBCALL_BLOCK. Changed
caller.
Mon Jul 6 22:21:56 1998 Kamil Iskra <iskra@student.uci.agh.edu.pl> Mon Jul 6 22:21:56 1998 Kamil Iskra <iskra@student.uci.agh.edu.pl>
* m68k.c (output_scc_di): Use cmpw #0 instead of tstl when * m68k.c (output_scc_di): Use cmpw #0 instead of tstl when

21
gcc/gcse.c
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@ -550,7 +550,7 @@ static void record_one_set PROTO ((int, rtx));
static void record_set_info PROTO ((rtx, rtx)); static void record_set_info PROTO ((rtx, rtx));
static void compute_sets PROTO ((rtx)); static void compute_sets PROTO ((rtx));
static void hash_scan_insn PROTO ((rtx, int)); static void hash_scan_insn PROTO ((rtx, int, int));
static void hash_scan_set PROTO ((rtx, rtx, int)); static void hash_scan_set PROTO ((rtx, rtx, int));
static void hash_scan_clobber PROTO ((rtx, rtx)); static void hash_scan_clobber PROTO ((rtx, rtx));
static void hash_scan_call PROTO ((rtx, rtx)); static void hash_scan_call PROTO ((rtx, rtx));
@ -1849,10 +1849,12 @@ hash_scan_call (x, insn)
are also in the PARALLEL. Later. are also in the PARALLEL. Later.
If SET_P is non-zero, this is for the assignment hash table, If SET_P is non-zero, this is for the assignment hash table,
otherwise it is for the expression hash table. */ otherwise it is for the expression hash table.
If IN_LIBCALL_BLOCK nonzero, we are in a libcall block, and should
not record any expressions. */
static void static void
hash_scan_insn (insn, set_p) hash_scan_insn (insn, set_p, in_libcall_block)
rtx insn; rtx insn;
int set_p; int set_p;
{ {
@ -1861,7 +1863,7 @@ hash_scan_insn (insn, set_p)
/* Pick out the sets of INSN and for other forms of instructions record /* Pick out the sets of INSN and for other forms of instructions record
what's been modified. */ what's been modified. */
if (GET_CODE (pat) == SET) if (GET_CODE (pat) == SET && ! in_libcall_block)
hash_scan_set (pat, insn, set_p); hash_scan_set (pat, insn, set_p);
else if (GET_CODE (pat) == PARALLEL) else if (GET_CODE (pat) == PARALLEL)
{ {
@ -2037,6 +2039,7 @@ compute_hash_table (f, set_p)
{ {
rtx insn; rtx insn;
int regno; int regno;
int in_libcall_block;
/* First pass over the instructions records information used to /* First pass over the instructions records information used to
determine when registers and memory are first and last set. determine when registers and memory are first and last set.
@ -2080,12 +2083,18 @@ compute_hash_table (f, set_p)
/* The next pass builds the hash table. */ /* The next pass builds the hash table. */
for (insn = basic_block_head[bb]; for (insn = basic_block_head[bb], in_libcall_block = 0;
insn && insn != NEXT_INSN (basic_block_end[bb]); insn && insn != NEXT_INSN (basic_block_end[bb]);
insn = NEXT_INSN (insn)) insn = NEXT_INSN (insn))
{ {
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
hash_scan_insn (insn, set_p); {
if (find_reg_note (insn, REG_LIBCALL, NULL_RTX))
in_libcall_block = 1;
else if (find_reg_note (insn, REG_RETVAL, NULL_RTX))
in_libcall_block = 0;
hash_scan_insn (insn, set_p, in_libcall_block);
}
} }
} }