authorgravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2019-07-03 14:43:33-04:00
committergravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2019-07-03 14:43:33-04:00
log2f4faf306d5d7a5b730b4dc6d426af713289bb51
tree51eab8ecad767f7436bf7ef3fe3f155009e5e5d1
parent53ca4118bdd3908092a53b6b4c59762a85b78dfc
parentbbc0d440b86a1783c1fddc5e594f9b4067016489
signature Commit is signed but in an unrecognized format.

Merge branch 'function-sections' of https://github.com/timonkruiper/zig into timonkruiper-function-sections

8 files changed, 77 insertions(+), 4 deletions(-)

src-self-hosted/compilation.zig+1
......@@ -516,6 +516,7 @@ pub const Compilation = struct {
516516 opt_level,
517517 reloc_mode,
518518 llvm.CodeModelDefault,
519 false // TODO: add -ffunction-sections option
519520 ) orelse return error.OutOfMemory;
520521 defer llvm.DisposeTargetMachine(comp.target_machine);
521522
src-self-hosted/llvm.zig+3-2
......@@ -163,8 +163,8 @@ extern fn LLVMCopyStringRepOfTargetData(TD: *TargetData) ?[*]u8;
163163pub const CreateTargetDataLayout = LLVMCreateTargetDataLayout;
164164extern fn LLVMCreateTargetDataLayout(T: *TargetMachine) ?*TargetData;
165165
166pub const CreateTargetMachine = LLVMCreateTargetMachine;
167extern fn LLVMCreateTargetMachine(
166pub const CreateTargetMachine = ZigLLVMCreateTargetMachine;
167extern fn ZigLLVMCreateTargetMachine(
168168 T: *Target,
169169 Triple: [*]const u8,
170170 CPU: [*]const u8,
......@@ -172,6 +172,7 @@ extern fn LLVMCreateTargetMachine(
172172 Level: CodeGenOptLevel,
173173 Reloc: RelocMode,
174174 CodeModel: CodeModel,
175 function_sections: bool,
175176) ?*TargetMachine;
176177
177178pub const GetHostCPUName = LLVMGetHostCPUName;
src/all_types.hpp+1
......@@ -1910,6 +1910,7 @@ struct CodeGen {
19101910 bool have_pic;
19111911 bool have_dynamic_link; // this is whether the final thing will be dynamically linked. see also is_dynamic
19121912 bool have_stack_probing;
1913 bool function_sections;
19131914
19141915 Buf *mmacosx_version_min;
19151916 Buf *mios_version_min;
src/codegen.cpp+5-2
......@@ -8134,8 +8134,9 @@ static void init(CodeGen *g) {
81348134 target_specific_features = "";
81358135 }
81368136
8137 g->target_machine = LLVMCreateTargetMachine(target_ref, buf_ptr(&g->triple_str),
8138 target_specific_cpu_args, target_specific_features, opt_level, reloc_mode, LLVMCodeModelDefault);
8137 g->target_machine = ZigLLVMCreateTargetMachine(target_ref, buf_ptr(&g->triple_str),
8138 target_specific_cpu_args, target_specific_features, opt_level, reloc_mode,
8139 LLVMCodeModelDefault, g->function_sections);
81398140
81408141 g->target_data_ref = LLVMCreateTargetDataLayout(g->target_machine);
81418142
......@@ -8767,6 +8768,7 @@ Error create_c_object_cache(CodeGen *g, CacheHash **out_cache_hash, bool verbose
87678768 for (size_t arg_i = 0; arg_i < g->clang_argv_len; arg_i += 1) {
87688769 cache_str(cache_hash, g->clang_argv[arg_i]);
87698770 }
8771 cache_bool(cache_hash, g->function_sections);
87708772
87718773 *out_cache_hash = cache_hash;
87728774 return ErrorNone;
......@@ -9479,6 +9481,7 @@ static Error check_cache(CodeGen *g, Buf *manifest_dir, Buf *digest) {
94799481 cache_bool(ch, g->have_dynamic_link);
94809482 cache_bool(ch, g->have_stack_probing);
94819483 cache_bool(ch, g->is_dummy_so);
9484 cache_bool(ch, g->function_sections);
94829485 cache_buf_opt(ch, g->mmacosx_version_min);
94839486 cache_buf_opt(ch, g->mios_version_min);
94849487 cache_usize(ch, g->version_major);
src/link.cpp+2
......@@ -791,6 +791,8 @@ static Buf *build_a_raw(CodeGen *parent_gen, const char *aname, Buf *full_path,
791791 new_link_lib->provided_explicitly = parent_gen->libc_link_lib->provided_explicitly;
792792 }
793793
794 child_gen->function_sections = true;
795
794796 codegen_build_and_link(child_gen);
795797 return &child_gen->output_file_path;
796798}
src/main.cpp+5
......@@ -85,6 +85,7 @@ static int print_full_usage(const char *arg0, FILE *file, int return_code) {
8585 " -isystem [dir] add additional search path for other .h files\n"
8686 " -mllvm [arg] forward an arg to LLVM's option processing\n"
8787 " --override-std-dir [arg] use an alternate Zig standard library\n"
88 " -ffunction-sections places each function in a seperate section\n"
8889 "\n"
8990 "Link Options:\n"
9091 " --bundle-compiler-rt [path] for static libraries, include compiler-rt symbols\n"
......@@ -452,6 +453,7 @@ int main(int argc, char **argv) {
452453 ValgrindSupport valgrind_support = ValgrindSupportAuto;
453454 WantPIC want_pic = WantPICAuto;
454455 WantStackCheck want_stack_check = WantStackCheckAuto;
456 bool function_sections = false;
455457
456458 ZigList<const char *> llvm_argv = {0};
457459 llvm_argv.append("zig (LLVM option parsing)");
......@@ -690,6 +692,8 @@ int main(int argc, char **argv) {
690692 return EXIT_FAILURE;
691693 }
692694 cur_pkg = cur_pkg->parent;
695 } else if (strcmp(arg, "-ffunction-sections") == 0) {
696 function_sections = true;
693697 } else if (i + 1 >= argc) {
694698 fprintf(stderr, "Expected another argument after %s\n", arg);
695699 return print_error_usage(arg0);
......@@ -1103,6 +1107,7 @@ int main(int argc, char **argv) {
11031107 g->bundle_compiler_rt = bundle_compiler_rt;
11041108 codegen_set_errmsg_color(g, color);
11051109 g->system_linker_hack = system_linker_hack;
1110 g->function_sections = function_sections;
11061111
11071112 for (size_t i = 0; i < lib_dirs.length; i += 1) {
11081113 codegen_add_lib_dir(g, lib_dirs.at(i));
src/zig_llvm.cpp+56
......@@ -39,7 +39,9 @@
3939#include <llvm/Support/TargetParser.h>
4040#include <llvm/Support/Timer.h>
4141#include <llvm/Support/raw_ostream.h>
42#include <llvm/Support/TargetRegistry.h>
4243#include <llvm/Target/TargetMachine.h>
44#include <llvm/Target/CodeGenCWrappers.h>
4345#include <llvm/Transforms/Coroutines.h>
4446#include <llvm/Transforms/IPO.h>
4547#include <llvm/Transforms/IPO/AlwaysInliner.h>
......@@ -93,6 +95,60 @@ static const bool assertions_on = true;
9395static const bool assertions_on = false;
9496#endif
9597
98LLVMTargetMachineRef ZigLLVMCreateTargetMachine(LLVMTargetRef T, const char *Triple,
99 const char *CPU, const char *Features, LLVMCodeGenOptLevel Level, LLVMRelocMode Reloc,
100 LLVMCodeModel CodeModel, bool function_sections)
101{
102 Optional<Reloc::Model> RM;
103 switch (Reloc){
104 case LLVMRelocStatic:
105 RM = Reloc::Static;
106 break;
107 case LLVMRelocPIC:
108 RM = Reloc::PIC_;
109 break;
110 case LLVMRelocDynamicNoPic:
111 RM = Reloc::DynamicNoPIC;
112 break;
113 case LLVMRelocROPI:
114 RM = Reloc::ROPI;
115 break;
116 case LLVMRelocRWPI:
117 RM = Reloc::RWPI;
118 break;
119 case LLVMRelocROPI_RWPI:
120 RM = Reloc::ROPI_RWPI;
121 break;
122 default:
123 break;
124 }
125
126 bool JIT;
127 Optional<CodeModel::Model> CM = unwrap(CodeModel, JIT);
128
129 CodeGenOpt::Level OL;
130 switch (Level) {
131 case LLVMCodeGenLevelNone:
132 OL = CodeGenOpt::None;
133 break;
134 case LLVMCodeGenLevelLess:
135 OL = CodeGenOpt::Less;
136 break;
137 case LLVMCodeGenLevelAggressive:
138 OL = CodeGenOpt::Aggressive;
139 break;
140 default:
141 OL = CodeGenOpt::Default;
142 break;
143 }
144
145 TargetOptions opt;
146 opt.FunctionSections = function_sections;
147
148 return reinterpret_cast<LLVMTargetMachineRef>(const_cast<TargetMachine *>(
149 reinterpret_cast<Target*>(T)->createTargetMachine(Triple, CPU, Features, opt, RM, CM, OL, JIT)));
150}
151
96152bool ZigLLVMTargetMachineEmitToFile(LLVMTargetMachineRef targ_machine_ref, LLVMModuleRef module_ref,
97153 const char *filename, ZigLLVM_EmitOutputType output_type, char **error_message, bool is_debug,
98154 bool is_small, bool time_report)
src/zig_llvm.h+4
......@@ -58,6 +58,10 @@ ZIG_EXTERN_C bool ZigLLVMTargetMachineEmitToFile(LLVMTargetMachineRef targ_machi
5858 const char *filename, enum ZigLLVM_EmitOutputType output_type, char **error_message, bool is_debug,
5959 bool is_small, bool time_report);
6060
61ZIG_EXTERN_C LLVMTargetMachineRef ZigLLVMCreateTargetMachine(LLVMTargetRef T, const char *Triple,
62 const char *CPU, const char *Features, LLVMCodeGenOptLevel Level, LLVMRelocMode Reloc,
63 LLVMCodeModel CodeModel, bool function_sections);
64
6165ZIG_EXTERN_C LLVMTypeRef ZigLLVMTokenTypeInContext(LLVMContextRef context_ref);
6266
6367enum ZigLLVM_FnInline {