src/amd/common/ac_llvm_helper.cpp

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25
  26 /* based on Marek's patch to lp_bld_misc.cpp */
  27
  28 // Workaround http://llvm.org/PR23628
  29 #pragma push_macro("DEBUG")
  30 #undef DEBUG
  31
  32 #include "ac_binary.h"
  33 #include "ac_llvm_util.h"
  34
  35 #include <llvm-c/Core.h>
  36 #include <llvm/Target/TargetMachine.h>
  37 #include <llvm/IR/IRBuilder.h>
  38 #include <llvm/Analysis/TargetLibraryInfo.h>
  39 #include <llvm/Transforms/IPO.h>
  40
  41 #include <llvm/IR/LegacyPassManager.h>
  42
  43 void ac_add_attr_dereferenceable(LLVMValueRef val, uint64_t bytes)
  44 {
  45    llvm::Argument *A = llvm::unwrap<llvm::Argument>(val);
  46    A->addAttr(llvm::Attribute::getWithDereferenceableBytes(A->getContext(), bytes));
  47 }
  48
  49 bool ac_is_sgpr_param(LLVMValueRef arg)
  50 {
  51         llvm::Argument *A = llvm::unwrap<llvm::Argument>(arg);
  52         llvm::AttributeList AS = A->getParent()->getAttributes();
  53         unsigned ArgNo = A->getArgNo();
  54         return AS.hasAttribute(ArgNo + 1, llvm::Attribute::InReg);
  55 }
  56
  57 LLVMValueRef ac_llvm_get_called_value(LLVMValueRef call)
  58 {
  59         return LLVMGetCalledValue(call);
  60 }
  61
  62 bool ac_llvm_is_function(LLVMValueRef v)
  63 {
  64         return LLVMGetValueKind(v) == LLVMFunctionValueKind;
  65 }
  66
  67 LLVMModuleRef ac_create_module(LLVMTargetMachineRef tm, LLVMContextRef ctx)
  68 {
  69    llvm::TargetMachine *TM = reinterpret_cast<llvm::TargetMachine*>(tm);
  70    LLVMModuleRef module = LLVMModuleCreateWithNameInContext("mesa-shader", ctx);
  71
  72    llvm::unwrap(module)->setTargetTriple(TM->getTargetTriple().getTriple());
  73    llvm::unwrap(module)->setDataLayout(TM->createDataLayout());
  74    return module;
  75 }
  76
  77 LLVMBuilderRef ac_create_builder(LLVMContextRef ctx,
  78                                  enum ac_float_mode float_mode)
  79 {
  80         LLVMBuilderRef builder = LLVMCreateBuilderInContext(ctx);
  81
  82         llvm::FastMathFlags flags;
  83
  84         switch (float_mode) {
  85         case AC_FLOAT_MODE_DEFAULT:
  86                 break;
  87         case AC_FLOAT_MODE_NO_SIGNED_ZEROS_FP_MATH:
  88                 flags.setNoSignedZeros();
  89                 llvm::unwrap(builder)->setFastMathFlags(flags);
  90                 break;
  91         case AC_FLOAT_MODE_UNSAFE_FP_MATH:
  92                 flags.setFast();
  93                 llvm::unwrap(builder)->setFastMathFlags(flags);
  94                 break;
  95         }
  96
  97         return builder;
  98 }
  99
 100 LLVMTargetLibraryInfoRef
 101 ac_create_target_library_info(const char *triple)
 102 {
 103         return reinterpret_cast<LLVMTargetLibraryInfoRef>(new llvm::TargetLibraryInfoImpl(llvm::Triple(triple)));
 104 }
 105
 106 void
 107 ac_dispose_target_library_info(LLVMTargetLibraryInfoRef library_info)
 108 {
 109         delete reinterpret_cast<llvm::TargetLibraryInfoImpl *>(library_info);
 110 }
 111
 112 /* The LLVM compiler is represented as a pass manager containing passes for
 113  * optimizations, instruction selection, and code generation.
 114  */
 115 struct ac_compiler_passes {
 116         ac_compiler_passes(): ostream(code_string) {}
 117
 118         llvm::SmallString<0> code_string;  /* ELF shader binary */
 119         llvm::raw_svector_ostream ostream; /* stream for appending data to the binary */
 120         llvm::legacy::PassManager passmgr; /* list of passes */
 121 };
 122
 123 struct ac_compiler_passes *ac_create_llvm_passes(LLVMTargetMachineRef tm)
 124 {
 125         struct ac_compiler_passes *p = new ac_compiler_passes();
 126         if (!p)
 127                 return NULL;
 128
 129         llvm::TargetMachine *TM = reinterpret_cast<llvm::TargetMachine*>(tm);
 130
 131         if (TM->addPassesToEmitFile(p->passmgr, p->ostream,
 132                                     nullptr,
 133                                     llvm::TargetMachine::CGFT_ObjectFile)) {
 134                 fprintf(stderr, "amd: TargetMachine can't emit a file of this type!\n");
 135                 delete p;
 136                 return NULL;
 137         }
 138         return p;
 139 }
 140
 141 void ac_destroy_llvm_passes(struct ac_compiler_passes *p)
 142 {
 143         delete p;
 144 }
 145
 146 /* This returns false on failure. */
 147 bool ac_compile_module_to_binary(struct ac_compiler_passes *p, LLVMModuleRef module,
 148                                  struct ac_shader_binary *binary)
 149 {
 150         p->passmgr.run(*llvm::unwrap(module));
 151
 152         llvm::StringRef data = p->ostream.str();
 153         bool success = ac_elf_read(data.data(), data.size(), binary);
 154         p->code_string = ""; /* release the ELF shader binary */
 155
 156         if (!success)
 157                 fprintf(stderr, "amd: cannot read an ELF shader binary\n");
 158         return success;
 159 }
 160
 161 void ac_llvm_add_barrier_noop_pass(LLVMPassManagerRef passmgr)
 162 {
 163         llvm::unwrap(passmgr)->add(llvm::createBarrierNoopPass());
 164 }
 165
 166 void ac_enable_global_isel(LLVMTargetMachineRef tm)
 167 {
 168   reinterpret_cast<llvm::TargetMachine*>(tm)->setGlobalISel(true);
 169 }