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author | Lai Wei-Chih <Robert.Lai@mediatek.com> | 2013-08-01 15:09:46 +0800 |
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committer | Andrew Hsieh <andrewhsieh@google.com> | 2013-08-02 09:16:10 +0800 |
commit | a3529b2d6b2bcc7136fd67e00e539301942e74d1 (patch) | |
tree | 3a65fd83e08762984d1721884e17215244460b14 /gcc-4.6 | |
parent | 15ba1ff9c0885836175afdcd03701e5a3e514ae1 (diff) | |
download | toolchain_gcc-a3529b2d6b2bcc7136fd67e00e539301942e74d1.tar.gz toolchain_gcc-a3529b2d6b2bcc7136fd67e00e539301942e74d1.tar.bz2 toolchain_gcc-a3529b2d6b2bcc7136fd67e00e539301942e74d1.zip |
Add an internal switch -minline-thumb1-jumptable to ARM gcc4.6/4.7/4.8
Default is off (ie. no changes of behavior), meaning that gcc may
generate thumb1 jumptable helper calls (eg. __gnu_thumb1_case_sqi) for
switch/case.
Use -minline-thumb1-jumptable to compile code which can be linked
with compiler-rt where helper __gnu_thumb1_case_* doesn't exist.
This is mainly for use to compile NDK gabi++/stlport/libc++ to be
independent of libgcc.a. The only affected binaries are all
in armeabi. ABIs armeabi-v7a and x86/mips aren't affected. Size
differences are
libgabi++_static.a 176286 -> 176538 +0.1%
libstlport_static.a 1406346 -> 1413318 +0.5%
libc++_static.a 2426814 -> 2439074 +0.5%
Change-Id: I582898955b28e53e988a91bc1a64b76fba677e58
Diffstat (limited to 'gcc-4.6')
-rw-r--r-- | gcc-4.6/gcc/config/arm/arm.h | 3 | ||||
-rw-r--r-- | gcc-4.6/gcc/config/arm/arm.md | 2 | ||||
-rw-r--r-- | gcc-4.6/gcc/config/arm/arm.opt | 4 | ||||
-rw-r--r-- | gcc-4.6/gcc/config/arm/elf.h | 3 |
4 files changed, 9 insertions, 3 deletions
diff --git a/gcc-4.6/gcc/config/arm/arm.h b/gcc-4.6/gcc/config/arm/arm.h index 9b0a83475..b41f3a73d 100644 --- a/gcc-4.6/gcc/config/arm/arm.h +++ b/gcc-4.6/gcc/config/arm/arm.h @@ -1965,10 +1965,11 @@ typedef struct #define CASE_VECTOR_PC_RELATIVE (TARGET_THUMB2 \ || (TARGET_THUMB1 \ + && !inline_thumb1_jump_table \ && (optimize_size || flag_pic))) #define CASE_VECTOR_SHORTEN_MODE(min, max, body) \ - (TARGET_THUMB1 \ + (TARGET_THUMB1 && !inline_thumb1_jump_table \ ? (min >= 0 && max < 512 \ ? (ADDR_DIFF_VEC_FLAGS (body).offset_unsigned = 1, QImode) \ : min >= -256 && max < 256 \ diff --git a/gcc-4.6/gcc/config/arm/arm.md b/gcc-4.6/gcc/config/arm/arm.md index cc73aa2f3..5a50f8754 100644 --- a/gcc-4.6/gcc/config/arm/arm.md +++ b/gcc-4.6/gcc/config/arm/arm.md @@ -8343,7 +8343,7 @@ (match_operand:SI 2 "const_int_operand" "") ; total range (match_operand:SI 3 "" "") ; table label (match_operand:SI 4 "" "")] ; Out of range label - "TARGET_32BIT || optimize_size || flag_pic" + "TARGET_32BIT || ((optimize_size || flag_pic) && !inline_thumb1_jump_table)" " { enum insn_code code; diff --git a/gcc-4.6/gcc/config/arm/arm.opt b/gcc-4.6/gcc/config/arm/arm.opt index a39bb3a8d..a7ab693b3 100644 --- a/gcc-4.6/gcc/config/arm/arm.opt +++ b/gcc-4.6/gcc/config/arm/arm.opt @@ -137,6 +137,10 @@ mthumb-interwork Target Report Mask(INTERWORK) Support calls between Thumb and ARM instruction sets +minline-thumb1-jumptable +Target Report Var(inline_thumb1_jump_table) +Inline Thumb1 Jump table code + mtp= Target RejectNegative Joined Var(target_thread_switch) Specify how to access the thread pointer diff --git a/gcc-4.6/gcc/config/arm/elf.h b/gcc-4.6/gcc/config/arm/elf.h index 44d840b39..cb84a594f 100644 --- a/gcc-4.6/gcc/config/arm/elf.h +++ b/gcc-4.6/gcc/config/arm/elf.h @@ -104,7 +104,8 @@ the code more efficient, but for Thumb-1 it's better to put them out of band unless we are generating compressed tables. */ #define JUMP_TABLES_IN_TEXT_SECTION \ - (TARGET_32BIT || (TARGET_THUMB && (optimize_size || flag_pic))) + (TARGET_32BIT || (TARGET_THUMB && !inline_thumb1_jump_table \ + && (optimize_size || flag_pic))) #ifndef LINK_SPEC #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" |