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Re:[PATCH] [ARC] Disable compact casesi patterns for arcv2
- From: Claudiu Zissulescu <Claudiu dot Zissulescu at synopsys dot com>
- To: <gcc-patches at gcc dot gnu dot org>, <andrew dot burgess at embecosm dot com>
- Cc: <Claudiu dot Zissulescu at synopsys dot com>
- Date: Fri, 30 Sep 2016 15:52:03 +0200
- Subject: Re:[PATCH] [ARC] Disable compact casesi patterns for arcv2
- Authentication-results: sourceware.org; auth=none
- References: <20160929192616.GF18222@embecosm.com>
Please find the updated patch,
Claudiu
gcc/
2016-05-09 Claudiu Zissulescu <claziss@synopsys.com>
* common/config/arc/arc-common.c (arc_option_optimization_table):
Remove compact casesi option.
* config/arc/arc.c (arc_override_options): Use compact casesi
option only for pre-ARCv2 cores.
* doc/invoke.texi (mcompact-casesi): Update text.
---
gcc/common/config/arc/arc-common.c | 1 -
gcc/config/arc/arc.c | 11 +++++++++++
gcc/doc/invoke.texi | 4 ++--
3 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/gcc/common/config/arc/arc-common.c b/gcc/common/config/arc/arc-common.c
index f5b9c6d..5b687fb 100644
--- a/gcc/common/config/arc/arc-common.c
+++ b/gcc/common/config/arc/arc-common.c
@@ -56,7 +56,6 @@ static const struct default_options arc_option_optimization_table[] =
{ OPT_LEVELS_ALL, OPT_mbbit_peephole, NULL, 1 },
{ OPT_LEVELS_SIZE, OPT_mq_class, NULL, 1 },
{ OPT_LEVELS_SIZE, OPT_mcase_vector_pcrel, NULL, 1 },
- { OPT_LEVELS_SIZE, OPT_mcompact_casesi, NULL, 1 },
{ OPT_LEVELS_NONE, 0, NULL, 0 }
};
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 2b25b0b..5e8d6b4 100644
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -858,6 +858,17 @@ arc_override_options (void)
if (arc_size_opt_level == 3)
optimize_size = 1;
+ /* Compact casesi is not a valid option for ARCv2 family. */
+ if (TARGET_V2
+ && TARGET_COMPACT_CASESI)
+ {
+ warning (0, "compact-casesi is not applicable to ARCv2");
+ TARGET_COMPACT_CASESI = 0;
+ }
+ else if (optimize_size == 1
+ && !global_options_set.x_TARGET_COMPACT_CASESI)
+ TARGET_COMPACT_CASESI = 1;
+
if (flag_pic)
target_flags |= MASK_NO_SDATA_SET;
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 6767462..05f565d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14255,8 +14255,8 @@ This is the default for @option{-Os}.
@item -mcompact-casesi
@opindex mcompact-casesi
-Enable compact casesi pattern.
-This is the default for @option{-Os}.
+Enable compact casesi pattern. This is the default for @option{-Os},
+and only available for ARCv1 cores.
@item -mno-cond-exec
@opindex mno-cond-exec
--
1.9.1