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| author | Richard Henderson <rth@redhat.com> | 2002-05-20 09:59:03 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2002-05-20 09:59:03 -0700 |
| commit | 1441374bc987ffd5e969ec1e58739c01696aba3b (patch) | |
| tree | 0e8241da43d327f7b9fc8d8237c6e39b2df91ec8 | |
| parent | 9aa338ece29130841d1e74c30fa37ca8ac72993b (diff) | |
| download | gcc-1441374bc987ffd5e969ec1e58739c01696aba3b.zip gcc-1441374bc987ffd5e969ec1e58739c01696aba3b.tar.gz gcc-1441374bc987ffd5e969ec1e58739c01696aba3b.tar.bz2 | |
cse.c (canon_hash): Reorder do_not_record test.
* cse.c (canon_hash): Reorder do_not_record test. Always
allow pic_offset_table_rtx.
From-SVN: r53665
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cse.c | 35 |
2 files changed, 29 insertions, 11 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 31e4d6e..70e76fc 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-05-20 Richard Henderson <rth@redhat.com> + + * cse.c (canon_hash): Reorder do_not_record test. Always + allow pic_offset_table_rtx. + 2002-05-19 Toon Moene <toon@moene.indiv.nluug.nl> * optabs.c (expand_cmplxdiv_wide): Use complex_part_zero_p. @@ -2249,10 +2249,11 @@ canon_hash (x, mode) case REG: { unsigned int regno = REGNO (x); + bool record; /* On some machines, we can't record any non-fixed hard register, because extending its life will cause reload problems. We - consider ap, fp, and sp to be fixed for this purpose. + consider ap, fp, sp, gp to be fixed for this purpose. We also consider CCmode registers to be fixed for this purpose; failure to do so leads to failure to simplify 0<100 type of @@ -2262,16 +2263,28 @@ canon_hash (x, mode) Nor should we record any register that is in a small class, as defined by CLASS_LIKELY_SPILLED_P. */ - if (regno < FIRST_PSEUDO_REGISTER - && (global_regs[regno] - || CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (regno)) - || (SMALL_REGISTER_CLASSES - && ! fixed_regs[regno] - && x != frame_pointer_rtx - && x != hard_frame_pointer_rtx - && x != arg_pointer_rtx - && x != stack_pointer_rtx - && GET_MODE_CLASS (GET_MODE (x)) != MODE_CC))) + if (regno >= FIRST_PSEUDO_REGISTER) + record = true; + else if (x == frame_pointer_rtx + || x == hard_frame_pointer_rtx + || x == arg_pointer_rtx + || x == stack_pointer_rtx + || x == pic_offset_table_rtx) + record = true; + else if (global_regs[regno]) + record = false; + else if (fixed_regs[regno]) + record = true; + else if (GET_MODE_CLASS (GET_MODE (x)) == MODE_CC) + record = true; + else if (SMALL_REGISTER_CLASSES) + record = false; + else if (CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (regno))) + record = false; + else + record = true; + + if (!record) { do_not_record = 1; return 0; |