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| author | Claudiu Zissulescu <claziss@synopsys.com> | 2018-11-13 13:51:30 +0100 |
|---|---|---|
| committer | Claudiu Zissulescu <claziss@gcc.gnu.org> | 2018-11-13 13:51:30 +0100 |
| commit | dddc18157283e3ab2a3a4c32ededae2386a54bb3 (patch) | |
| tree | 330a73d9015fedd81c8b5b5cb213f5e54490177a | |
| parent | 3fd6ae8a2541dad32b03c4c039127f0651dbdf1f (diff) | |
| download | gcc-dddc18157283e3ab2a3a4c32ededae2386a54bb3.zip gcc-dddc18157283e3ab2a3a4c32ededae2386a54bb3.tar.gz gcc-dddc18157283e3ab2a3a4c32ededae2386a54bb3.tar.bz2 | |
[ARC] Do not emit ZOL in the presence of text jump tables.
Avoid emitting lp instruction when in its ZOL body we find a jump
table data in text section. One of the reason is the jump tables size
can be changed latter on, hence the total ZOL length may be wrongly
computed.
gcc/
xxxx-xx-xx Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.c (hwloop_optimize): Bailout when detecting a
jump table data in the text section.
From-SVN: r266067
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/arc/arc.c | 12 |
2 files changed, 16 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5683289..7ba3fd3f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2018-11-13 Claudiu Zissulescu <claziss@synopsys.com> + * config/arc/arc.c (hwloop_optimize): Bailout when detecting a + jump table data in the text section. + +2018-11-13 Claudiu Zissulescu <claziss@synopsys.com> + * config/arc/arc.c (arc_eh_return_address_location): Repurpose it to fit the eh_return pattern. * config/arc/arc.md (eh_return): Define. diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c index dbe6ff5..6bf8e85 100644 --- a/gcc/config/arc/arc.c +++ b/gcc/config/arc/arc.c @@ -7861,7 +7861,17 @@ hwloop_optimize (hwloop_info loop) for (insn = loop->start_label; insn && insn != loop->loop_end; insn = NEXT_INSN (insn)) - length += NONDEBUG_INSN_P (insn) ? get_attr_length (insn) : 0; + { + length += NONDEBUG_INSN_P (insn) ? get_attr_length (insn) : 0; + if (JUMP_TABLES_IN_TEXT_SECTION + && JUMP_TABLE_DATA_P (insn)) + { + if (dump_file) + fprintf (dump_file, ";; loop %d has a jump table\n", + loop->loop_no); + return false; + } + } if (!insn) { |