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Compiler Command-line Options Usage Use --remove_unneeded_entities to reduce debug object and image file sizes. Faster linkage times can also be achieved. Caution Although --remove_unneeded_entities can help to reduce the amount of debug information generated per file, it has the disadvantage of reducing the number of debug sections that are common to many files. This reduces the number of common debug sections that the linker is able to remove at final link time, and can result in a final debug image that is larger than necessary. For this reason, use --remove_unneeded_entities only when necessary. Restrictions The effects of these options are restricted to debug information. Default Removal of unneeded entities is disabled by default. See also • The DWARF Debugging Standard, http://dwarfstd.org/ 2.1.142 --restrict, --no_restrict This option enables or disables the use of the C99 keyword restrict. Note The alternative keywords __restrict and __restrict__ are supported as synonyms for restrict. These alternative keywords are always available, regardless of the use of the --restrict option. Default When compiling ISO C99 source code, use of the C99 keyword restrict is enabled by default. When compiling ISO C90 or ISO C++ source code, use of the C99 keyword restrict is disabled by default. 2-112 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler Command-line Options See also • restrict on page 3-8. 2.1.143 --retain=option This option enables you to restrict the optimizations performed by the compiler, and might be useful when performing validation, debugging, and coverage testing. Syntax --retain=option Where option is one of the following: fns inlinefns prevents the removal of unused functions prevents the removal of unused inline functions noninlinefns prevents the removal of unused non-inline functions paths calls prevents path-removing optimizations, such as a||b transformed to a|b. This supports Modified Condition Decision Coverage (MCDC) testing. prevents calls being removed, for example by inlining or tailcalling. calls:distinct prevents calls being merged, for example by cross-jumping (that is, common tail path merging). libcalls data rodata rwdata data:order prevents calls to library functions being removed, for example by inline expansion. prevents data being removed. prevents read-only data being removed. prevents read-write data being removed. prevents data being reordered. See also • __attribute__((nomerge)) on page 4-35 • __attribute__((notailcall)) on page 4-37. ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 2-113 ID101213 Non-Confidential,
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Contents RealView Compilation Tools
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Preface This preface introduces the
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Preface Appendix A Via File Syntax
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Preface Other publications The foll
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Chapter 1 Introduction This chapter
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Introduction 1.2 Source language mo
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Introduction 1.3 Language extension
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Introduction • Compiling a C sour
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Chapter 2 Compiler Command-line Opt
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Compiler Command-line Options 2.1.2
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Compiler Command-line Options Each
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Compiler Command-line Options Note
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Compiler Command-line Options • -
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Compiler Command-line Options Restr
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Compiler Command-line Options Synta
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Compiler Command-line Options Compi
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Language Extensions 3.7.5 Character
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Language Extensions • You can use
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Language Extensions Errors The comp
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Chapter 4 Compiler-specific Feature
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Compiler-specific Features Usage __
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Compiler-specific Features Return v
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Compiler-specific Features Example
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Compiler-specific Features The func
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Compiler-specific Features Note The
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Compiler-specific Features Syntax _
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Compiler-specific Features See also
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Compiler-specific Features __weak v
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Compiler-specific Features When a c
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Compiler-specific Features Examples
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Compiler-specific Features Usage If
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Compiler-specific Features 4.3 Func
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Compiler-specific Features 4.3.2 __
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Compiler-specific Features Note Thi
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Compiler-specific Features 4.3.11 _
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Compiler-specific Features 4.4 Type
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Compiler-specific Features • Bit-
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Compiler-specific Features 4.5 Vari
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Compiler-specific Features In parti
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Compiler-specific Features 4.5.5 __
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Compiler-specific Features Note You
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Compiler-specific Features Default
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Compiler-specific Features Note Bot
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Compiler-specific Features 4.7 Inst
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Compiler-specific Features opcode2
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Compiler-specific Features Syntax v
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Compiler-specific Features Restrict
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Compiler-specific Features 4.7.44 A
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Compiler-specific Features Table 4-
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Compiler-specific Features 4.7.47 A
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Chapter 5 C and C++ Implementation
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C and C++ Implementation Details th
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C and C++ Implementation Details Se
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C and C++ Implementation Details
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C and C++ Implementation Details 5.
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C and C++ Implementation Details No
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C and C++ Implementation Details na
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C and C++ Implementation Details 5.
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Appendix A Via File Syntax This app
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Via File Syntax A.2 Syntax Via file
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Appendix B Standard C Implementatio
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Standard C Implementation Definitio
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Appendix C Standard C++ Implementat
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Standard C++ Implementation Definit
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Standard C++ Implementation Definit
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Appendix D C and C++ Compiler Imple
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C and C++ Compiler Implementation L
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C and C++ Compiler Implementation L
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Appendix E Using NEON Support This
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Using NEON Support E.2 Vector data
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Using NEON Support • Vector long
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Using NEON Support uint64x1_t vqadd
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Using NEON Support Vector multiply
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Using NEON Support int64x1_t vqsub_
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Using NEON Support uint32x2_t vcle_
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Using NEON Support uint16x4_t vabd_
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Using NEON Support Long pairwise ad
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Using NEON Support int16x8_t vqshlq
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Using NEON Support uint8x8_t vrshr_
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Using NEON Support Vector signed->u
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Using NEON Support uint8x16_t vld1q
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Using NEON Support int16x4_t lane);
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Using NEON Support // VST1.8 {d0},
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Using NEON Support uint64x1x2_t vld
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Using NEON Support float32x2x4_t vl
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Using NEON Support lane); // VLD2.8
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Using NEON Support // VLD4.16 {d0[0
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Using NEON Support // VST3.32 {d0,
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Using NEON Support // VST3.32 {d0[0
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Using NEON Support uint8x8_t vset_l
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Using NEON Support float32x2_t vmov
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Using NEON Support uint32x2_t vcvt_
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Using NEON Support // VMLA.I16 d0,
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Using NEON Support Vector long mult
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Using NEON Support Bitwise and int8
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Using NEON Support Bitwise Select N
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Using NEON Support E.3.31 Vector re
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