diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2022-07-14 18:50:02 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2022-07-14 18:50:02 +0000 |
| commit | 1f917f69ff07f09b6dbb670971f57f8efe718b84 (patch) | |
| tree | 99293cbc1411737cd995dac10a99b2c40ef0944c /lld/ELF/InputSection.h | |
| parent | 145449b1e420787bb99721a429341fa6be3adfb6 (diff) | |
Vendor import of llvm-project main llvmorg-15-init-16436-g18a6ab5b8d1f.vendor/llvm-project/llvmorg-15-init-16436-g18a6ab5b8d1f
Diffstat (limited to 'lld/ELF/InputSection.h')
| -rw-r--r-- | lld/ELF/InputSection.h | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/lld/ELF/InputSection.h b/lld/ELF/InputSection.h index c7c8f45f432d..d1b889750bbd 100644 --- a/lld/ELF/InputSection.h +++ b/lld/ELF/InputSection.h @@ -10,7 +10,9 @@ #define LLD_ELF_INPUT_SECTION_H #include "Relocations.h" +#include "lld/Common/CommonLinkerContext.h" #include "lld/Common/LLVM.h" +#include "lld/Common/Memory.h" #include "llvm/ADT/CachedHashString.h" #include "llvm/ADT/DenseSet.h" #include "llvm/ADT/TinyPtrVector.h" @@ -97,6 +99,8 @@ protected: link(link), info(info) {} }; +struct RISCVRelaxAux; + // This corresponds to a section of an input file. class InputSectionBase : public SectionBase { public: @@ -129,11 +133,10 @@ public: return cast_or_null<ObjFile<ELFT>>(file); } - // If basic block sections are enabled, many code sections could end up with - // one or two jump instructions at the end that could be relaxed to a smaller - // instruction. The members below help trimming the trailing jump instruction - // and shrinking a section. - uint8_t bytesDropped = 0; + // Used by --optimize-bb-jumps and RISC-V linker relaxation temporarily to + // indicate the number of bytes which is not counted in the size. This should + // be reset to zero after uses. + uint16_t bytesDropped = 0; // Whether the section needs to be padded with a NOP filler due to // deleteFallThruJmpInsn. @@ -201,11 +204,17 @@ public: // This vector contains such "cooked" relocations. SmallVector<Relocation, 0> relocations; - // These are modifiers to jump instructions that are necessary when basic - // block sections are enabled. Basic block sections creates opportunities to - // relax jump instructions at basic block boundaries after reordering the - // basic blocks. - JumpInstrMod *jumpInstrMod = nullptr; + union { + // These are modifiers to jump instructions that are necessary when basic + // block sections are enabled. Basic block sections creates opportunities + // to relax jump instructions at basic block boundaries after reordering the + // basic blocks. + JumpInstrMod *jumpInstrMod = nullptr; + + // Auxiliary information for RISC-V linker relaxation. RISC-V does not use + // jumpInstrMod. + RISCVRelaxAux *relaxAux; + }; // A function compiled with -fsplit-stack calling a function // compiled without -fsplit-stack needs its prologue adjusted. Find |