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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1998-07-06 21:50:50 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-07-06 15:50:50 -0600 |
| commit | ed79bb3d427c5fa3fa39240a965f47de2463c37c (patch) | |
| tree | 62fb7190f182ab40d6bda74df6f131aa8dd17194 /gcc | |
| parent | fcc60894b89947e0fb4a0833d6c99a7c20cf6e63 (diff) | |
| download | gcc-ed79bb3d427c5fa3fa39240a965f47de2463c37c.zip gcc-ed79bb3d427c5fa3fa39240a965f47de2463c37c.tar.gz gcc-ed79bb3d427c5fa3fa39240a965f47de2463c37c.tar.bz2 | |
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/gcse.c | 21 |
2 files changed, 20 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 275b162..9f0c949 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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> * m68k.c (output_scc_di): Use cmpw #0 instead of tstl when @@ -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); + } } } |