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| author | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-07-06 21:50:50 +0000 |
|---|---|---|
| committer | law <law@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-07-06 21:50:50 +0000 |
| commit | 855e19b77183c2d501e2fc020e10a5bb06ab043d (patch) | |
| tree | 62fb7190f182ab40d6bda74df6f131aa8dd17194 /gcc/gcse.c | |
| parent | a9d2fc740c54e6c35fbf20e70fd5272b3a3e7178 (diff) | |
| download | gcc-855e19b77183c2d501e2fc020e10a5bb06ab043d.tar.gz | |
* gcse.c (hash_scan_insn): New argument IN_LIBCALL_BLOCK. Changed
caller.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@20967 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/gcc/gcse.c b/gcc/gcse.c index c40f6873065..c424a33264f 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -550,7 +550,7 @@ static void record_one_set PROTO ((int, rtx)); static void record_set_info PROTO ((rtx, 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_clobber 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. 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 -hash_scan_insn (insn, set_p) +hash_scan_insn (insn, set_p, in_libcall_block) rtx insn; 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 what's been modified. */ - if (GET_CODE (pat) == SET) + if (GET_CODE (pat) == SET && ! in_libcall_block) hash_scan_set (pat, insn, set_p); else if (GET_CODE (pat) == PARALLEL) { @@ -2037,6 +2039,7 @@ compute_hash_table (f, set_p) { rtx insn; int regno; + int in_libcall_block; /* First pass over the instructions records information used to 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. */ - 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 = NEXT_INSN (insn)) { 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); + } } } |