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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2019-10-01 13:12:03 +0200 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2019-10-01 13:12:03 +0200 |
| commit | 58e721d255c111b2ae012bb452cf39a0ee58ed27 (patch) | |
| tree | 59ab2b4f6d6c4597222a80185f9b13607e01b69b | |
| parent | 4d07a2ece6603beaf3f9583ec5f6ae00b1df3148 (diff) | |
| download | gcc-58e721d255c111b2ae012bb452cf39a0ee58ed27.zip gcc-58e721d255c111b2ae012bb452cf39a0ee58ed27.tar.gz gcc-58e721d255c111b2ae012bb452cf39a0ee58ed27.tar.bz2 | |
regrename: Use PC instead of CC0 to hide operands
The regrename pass temporarily changes some operand RTL to CC0 so that
note_stores and scan_rtx don't see those operands. CC0 is deprecated
and we want to remove it, so we need to use something else here.
PC fits the bill fine.
* regrename.c (hide_operands): Use pc_rtx instead of cc0_rtx.
(build_def_use): Use PC instead of CC0 in a comment.
From-SVN: r276401
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/regrename.c | 8 |
2 files changed, 9 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2c515e1..4d0ce47 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2019-10-01 Segher Boessenkool <segher@kernel.crashing.org> + + * regrename.c (hide_operands): Use pc_rtx instead of cc0_rtx. + (build_def_use): Use PC instead of CC0 in a comment. + 2019-10-01 Richard Sandiford <richard.sandiford@arm.com> * rtl.def (CLOBBER_HIGH): Delete. diff --git a/gcc/regrename.c b/gcc/regrename.c index 8c3bae8..408bccc 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -1517,7 +1517,7 @@ scan_rtx (rtx_insn *insn, rtx *loc, enum reg_class cl, enum scan_actions action, } /* Hide operands of the current insn (of which there are N_OPS) by - substituting cc0 for them. + substituting pc for them. Previous values are stored in the OLD_OPERANDS and OLD_DUPS. For every bit set in DO_NOT_HIDE, we leave the operand alone. If INOUT_AND_EC_ONLY is set, we only do this for OP_INOUT type operands @@ -1541,7 +1541,7 @@ hide_operands (int n_ops, rtx *old_operands, rtx *old_dups, continue; if (!inout_and_ec_only || recog_data.operand_type[i] == OP_INOUT || op_alt[i].earlyclobber) - *recog_data.operand_loc[i] = cc0_rtx; + *recog_data.operand_loc[i] = pc_rtx; } for (i = 0; i < recog_data.n_dups; i++) { @@ -1551,7 +1551,7 @@ hide_operands (int n_ops, rtx *old_operands, rtx *old_dups, continue; if (!inout_and_ec_only || recog_data.operand_type[opn] == OP_INOUT || op_alt[opn].earlyclobber) - *recog_data.dup_loc[i] = cc0_rtx; + *recog_data.dup_loc[i] = pc_rtx; } } @@ -1754,7 +1754,7 @@ build_def_use (basic_block bb) /* Step 2: Mark chains for which we have reads outside operands as unrenamable. - We do this by munging all operands into CC0, and closing + We do this by munging all operands into PC, and closing everything remaining. */ hide_operands (n_ops, old_operands, old_dups, untracked_operands, |