diff options
Diffstat (limited to 'toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch')
| -rw-r--r-- | toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch b/toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch new file mode 100644 index 000000000..dc03a028e --- /dev/null +++ b/toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch @@ -0,0 +1,100 @@ +From 09463827001a7b8094f4b9460514370a1876d908 Mon Sep 17 00:00:00 2001 +From: Claudiu Zissulescu <claziss@synopsys.com> +Date: Wed, 20 Jan 2016 16:32:40 +0100 +Subject: [PATCH] Don't allow mcompact-casesi for ARCv2 + +The compact casesi is not working for arcv2 processors family as it +makes use of the add_s rx,rx,pcl instruction which is only valid for +arc6xx and arc700 processors. Also not having this instruction makes +no much sens to change the compact-casesi pattern to use normal add +instructions as it nullifies the advantage of short instruction use. +The default casesi pattern betters suits the arcv2 architecture. + +The fix is done in development tree: [arc-4.8-dev 0946382] +and will be a part of the next release of ARC GNU tools. +Once that new release happens this patch must be removed. + +gcc/ +2016-01-20 Claudiu Zissulescu <claziss@synopsys.com> + + * common/config/arc/arc-common.c (arc_option_optimization_table): + Remove mcompact-casesi option. + * config/arc/arc.c (arc_override_options): Use compact-casesi only + for arcv1. + * config/arc/arc.md (casesi_load): Use short instructions. +--- + gcc/common/config/arc/arc-common.c | 1 - + gcc/config/arc/arc.c | 9 +++++---- + gcc/config/arc/arc.md | 10 ++++++++-- + 3 files changed, 13 insertions(+), 7 deletions(-) + + * config/arc/arc.c (arc_legitimize_pic_address): Handle MINUS +diff --git a/gcc/common/config/arc/arc-common.c b/gcc/common/config/arc/arc-common.c +index e2e36fa..310bc80 100644 +--- a/gcc/common/config/arc/arc-common.c ++++ b/gcc/common/config/arc/arc-common.c +@@ -58,7 +58,6 @@ 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 18d88a3..f828398 100644 +--- a/gcc/config/arc/arc.c ++++ b/gcc/config/arc/arc.c +@@ -1151,6 +1151,11 @@ arc_override_options (void) + if (arc_size_opt_level == 3) + optimize_size = 1; + ++ if (TARGET_V2) ++ TARGET_COMPACT_CASESI = 0; ++ else if (optimize_size == 1) ++ TARGET_COMPACT_CASESI = 1; ++ + if (flag_pic) + target_flags |= MASK_NO_SDATA_SET; + +@@ -1163,10 +1168,6 @@ arc_override_options (void) + if (!TARGET_Q_CLASS) + TARGET_COMPACT_CASESI = 0; + +- /* For the time being don't support COMPACT_CASESI for ARCv2. */ +- if (TARGET_V2) +- TARGET_COMPACT_CASESI = 0; +- + if (TARGET_COMPACT_CASESI) + TARGET_CASE_VECTOR_PC_RELATIVE = 1; + +diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md +index bc4ac38..ba7c8bc 100644 +--- a/gcc/config/arc/arc.md ++++ b/gcc/config/arc/arc.md +@@ -3837,14 +3837,20 @@ + switch (GET_MODE (diff_vec)) + { + case SImode: +- return \"ld.as %0,[%1,%2]%&\"; ++ if ((which_alternative == 0) && TARGET_CODE_DENSITY) ++ return \"ld_s.as %0,[%1,%2]%&\"; ++ else ++ return \"ld.as %0,[%1,%2]%&\"; + case HImode: + if (ADDR_DIFF_VEC_FLAGS (diff_vec).offset_unsigned) + return \"ldw.as %0,[%1,%2]\"; + return \"ldw.x.as %0,[%1,%2]\"; + case QImode: + if (ADDR_DIFF_VEC_FLAGS (diff_vec).offset_unsigned) +- return \"ldb%? %0,[%1,%2]%&\"; ++ if (which_alternative == 0) ++ return \"ldb_s %0,[%1,%2]%&\"; ++ else ++ return \"ldb %0,[%1,%2]%&\"; + return \"ldb.x %0,[%1,%2]\"; + default: + gcc_unreachable (); +-- +2.5.0 + |