src/amd/common/ac_llvm_util.c

   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 /* based on pieces from si_pipe.c and radeon_llvm_emit.c */
  26 #include "ac_llvm_util.h"
  27 #include "util/bitscan.h"
  28 #include <llvm-c/Core.h>
  29 #include <llvm-c/Support.h>
  30 #include "c11/threads.h"
  31
  32 #include <assert.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35
  36 static void ac_init_llvm_target()
  37 {
  38         LLVMInitializeAMDGPUTargetInfo();
  39         LLVMInitializeAMDGPUTarget();
  40         LLVMInitializeAMDGPUTargetMC();
  41         LLVMInitializeAMDGPUAsmPrinter();
  42
  43         /*
  44          * Workaround for bug in llvm 4.0 that causes image intrinsics
  45          * to disappear.
  46          * https://reviews.llvm.org/D26348
  47          */
  48 #if HAVE_LLVM >= 0x0400
  49         const char *argv[2] = {"mesa", "-simplifycfg-sink-common=false"};
  50         LLVMParseCommandLineOptions(2, argv, NULL);
  51 #endif
  52
  53 }
  54
  55 static once_flag ac_init_llvm_target_once_flag = ONCE_FLAG_INIT;
  56
  57 static LLVMTargetRef ac_get_llvm_target(const char *triple)
  58 {
  59         LLVMTargetRef target = NULL;
  60         char *err_message = NULL;
  61
  62         call_once(&ac_init_llvm_target_once_flag, ac_init_llvm_target);
  63
  64         if (LLVMGetTargetFromTriple(triple, &target, &err_message)) {
  65                 fprintf(stderr, "Cannot find target for triple %s ", triple);
  66                 if (err_message) {
  67                         fprintf(stderr, "%s\n", err_message);
  68                 }
  69                 LLVMDisposeMessage(err_message);
  70                 return NULL;
  71         }
  72         return target;
  73 }
  74
  75 static const char *ac_get_llvm_processor_name(enum radeon_family family)
  76 {
  77         switch (family) {
  78         case CHIP_TAHITI:
  79                 return "tahiti";
  80         case CHIP_PITCAIRN:
  81                 return "pitcairn";
  82         case CHIP_VERDE:
  83                 return "verde";
  84         case CHIP_OLAND:
  85                 return "oland";
  86         case CHIP_HAINAN:
  87                 return "hainan";
  88         case CHIP_BONAIRE:
  89                 return "bonaire";
  90         case CHIP_KABINI:
  91                 return "kabini";
  92         case CHIP_KAVERI:
  93                 return "kaveri";
  94         case CHIP_HAWAII:
  95                 return "hawaii";
  96         case CHIP_MULLINS:
  97                 return "mullins";
  98         case CHIP_TONGA:
  99                 return "tonga";
 100         case CHIP_ICELAND:
 101                 return "iceland";
 102         case CHIP_CARRIZO:
 103                 return "carrizo";
 104         case CHIP_FIJI:
 105                 return "fiji";
 106         case CHIP_STONEY:
 107                 return "stoney";
 108         case CHIP_POLARIS10:
 109                 return "polaris10";
 110         case CHIP_POLARIS11:
 111         case CHIP_POLARIS12:
 112                 return "polaris11";
 113         case CHIP_VEGA10:
 114         case CHIP_RAVEN:
 115                 return "gfx900";
 116         default:
 117                 return "";
 118         }
 119 }
 120
 121 LLVMTargetMachineRef ac_create_target_machine(enum radeon_family family, enum ac_target_machine_options tm_options)
 122 {
 123         assert(family >= CHIP_TAHITI);
 124         char features[256];
 125         const char *triple = (tm_options & AC_TM_SUPPORTS_SPILL) ? "amdgcn-mesa-mesa3d" : "amdgcn--";
 126         LLVMTargetRef target = ac_get_llvm_target(triple);
 127
 128         snprintf(features, sizeof(features),
 129                  "+DumpCode,+vgpr-spilling,-fp32-denormals%s%s",
 130                  family >= CHIP_VEGA10 ? ",+xnack" : ",-xnack",
 131                  tm_options & AC_TM_SISCHED ? ",+si-scheduler" : "");
 132
 133         LLVMTargetMachineRef tm = LLVMCreateTargetMachine(
 134                                      target,
 135                                      triple,
 136                                      ac_get_llvm_processor_name(family),
 137                                      features,
 138                                      LLVMCodeGenLevelDefault,
 139                                      LLVMRelocDefault,
 140                                      LLVMCodeModelDefault);
 141
 142         return tm;
 143 }
 144
 145
 146 #if HAVE_LLVM < 0x0400
 147 static LLVMAttribute ac_attr_to_llvm_attr(enum ac_func_attr attr)
 148 {
 149    switch (attr) {
 150    case AC_FUNC_ATTR_ALWAYSINLINE: return LLVMAlwaysInlineAttribute;
 151    case AC_FUNC_ATTR_BYVAL: return LLVMByValAttribute;
 152    case AC_FUNC_ATTR_INREG: return LLVMInRegAttribute;
 153    case AC_FUNC_ATTR_NOALIAS: return LLVMNoAliasAttribute;
 154    case AC_FUNC_ATTR_NOUNWIND: return LLVMNoUnwindAttribute;
 155    case AC_FUNC_ATTR_READNONE: return LLVMReadNoneAttribute;
 156    case AC_FUNC_ATTR_READONLY: return LLVMReadOnlyAttribute;
 157    default:
 158            fprintf(stderr, "Unhandled function attribute: %x\n", attr);
 159            return 0;
 160    }
 161 }
 162
 163 #else
 164
 165 static const char *attr_to_str(enum ac_func_attr attr)
 166 {
 167    switch (attr) {
 168    case AC_FUNC_ATTR_ALWAYSINLINE: return "alwaysinline";
 169    case AC_FUNC_ATTR_BYVAL: return "byval";
 170    case AC_FUNC_ATTR_INREG: return "inreg";
 171    case AC_FUNC_ATTR_NOALIAS: return "noalias";
 172    case AC_FUNC_ATTR_NOUNWIND: return "nounwind";
 173    case AC_FUNC_ATTR_READNONE: return "readnone";
 174    case AC_FUNC_ATTR_READONLY: return "readonly";
 175    case AC_FUNC_ATTR_WRITEONLY: return "writeonly";
 176    case AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY: return "inaccessiblememonly";
 177    case AC_FUNC_ATTR_CONVERGENT: return "convergent";
 178    default:
 179            fprintf(stderr, "Unhandled function attribute: %x\n", attr);
 180            return 0;
 181    }
 182 }
 183
 184 #endif
 185
 186 void
 187 ac_add_function_attr(LLVMContextRef ctx, LLVMValueRef function,
 188                      int attr_idx, enum ac_func_attr attr)
 189 {
 190 #if HAVE_LLVM < 0x0400
 191    LLVMAttribute llvm_attr = ac_attr_to_llvm_attr(attr);
 192    if (attr_idx == -1) {
 193       LLVMAddFunctionAttr(function, llvm_attr);
 194    } else {
 195       LLVMAddAttribute(LLVMGetParam(function, attr_idx - 1), llvm_attr);
 196    }
 197 #else
 198    const char *attr_name = attr_to_str(attr);
 199    unsigned kind_id = LLVMGetEnumAttributeKindForName(attr_name,
 200                                                       strlen(attr_name));
 201    LLVMAttributeRef llvm_attr = LLVMCreateEnumAttribute(ctx, kind_id, 0);
 202
 203    if (LLVMIsAFunction(function))
 204       LLVMAddAttributeAtIndex(function, attr_idx, llvm_attr);
 205    else
 206       LLVMAddCallSiteAttribute(function, attr_idx, llvm_attr);
 207 #endif
 208 }
 209
 210 void ac_add_func_attributes(LLVMContextRef ctx, LLVMValueRef function,
 211                             unsigned attrib_mask)
 212 {
 213         attrib_mask |= AC_FUNC_ATTR_NOUNWIND;
 214         attrib_mask &= ~AC_FUNC_ATTR_LEGACY;
 215
 216         while (attrib_mask) {
 217                 enum ac_func_attr attr = 1u << u_bit_scan(&attrib_mask);
 218                 ac_add_function_attr(ctx, function, -1, attr);
 219         }
 220 }
 221
 222 void
 223 ac_dump_module(LLVMModuleRef module)
 224 {
 225         char *str = LLVMPrintModuleToString(module);
 226         fprintf(stderr, "%s", str);
 227         LLVMDisposeMessage(str);
 228 }
 229
 230 void
 231 ac_llvm_add_target_dep_function_attr(LLVMValueRef F,
 232                                      const char *name, int value)
 233 {
 234         char str[16];
 235
 236         snprintf(str, sizeof(str), "%i", value);
 237         LLVMAddTargetDependentFunctionAttr(F, name, str);
 238 }