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_llvm_util.h"
  33 #include <llvm-c/Core.h>
  34 #include <llvm/Target/TargetOptions.h>
  35 #include <llvm/ExecutionEngine/ExecutionEngine.h>
  36 #include <llvm/IR/Attributes.h>
  37 #include <llvm/IR/CallSite.h>
  38 #include <llvm/IR/IRBuilder.h>
  39
  40 #if HAVE_LLVM < 0x0500
  41 namespace llvm {
  42 typedef AttributeSet AttributeList;
  43 }
  44 #endif
  45
  46 void ac_add_attr_dereferenceable(LLVMValueRef val, uint64_t bytes)
  47 {
  48    llvm::Argument *A = llvm::unwrap<llvm::Argument>(val);
  49 #if HAVE_LLVM < 0x0500
  50    llvm::AttrBuilder B;
  51    B.addDereferenceableAttr(bytes);
  52    A->addAttr(llvm::AttributeList::get(A->getContext(), A->getArgNo() + 1,  B));
  53 #else
  54    A->addAttr(llvm::Attribute::getWithDereferenceableBytes(A->getContext(), bytes));
  55 #endif
  56 }
  57
  58 bool ac_is_sgpr_param(LLVMValueRef arg)
  59 {
  60         llvm::Argument *A = llvm::unwrap<llvm::Argument>(arg);
  61         llvm::AttributeList AS = A->getParent()->getAttributes();
  62         unsigned ArgNo = A->getArgNo();
  63         return AS.hasAttribute(ArgNo + 1, llvm::Attribute::InReg);
  64 }
  65
  66 LLVMValueRef ac_llvm_get_called_value(LLVMValueRef call)
  67 {
  68         return LLVMGetCalledValue(call);
  69 }
  70
  71 bool ac_llvm_is_function(LLVMValueRef v)
  72 {
  73         return LLVMGetValueKind(v) == LLVMFunctionValueKind;
  74 }
  75
  76 LLVMBuilderRef ac_create_builder(LLVMContextRef ctx,
  77                                  enum ac_float_mode float_mode)
  78 {
  79         LLVMBuilderRef builder = LLVMCreateBuilderInContext(ctx);
  80
  81         llvm::FastMathFlags flags;
  82
  83         switch (float_mode) {
  84         case AC_FLOAT_MODE_DEFAULT:
  85                 break;
  86         case AC_FLOAT_MODE_NO_SIGNED_ZEROS_FP_MATH:
  87                 flags.setNoSignedZeros();
  88                 llvm::unwrap(builder)->setFastMathFlags(flags);
  89                 break;
  90         case AC_FLOAT_MODE_UNSAFE_FP_MATH:
  91 #if HAVE_LLVM >= 0x0600
  92                 flags.setFast();
  93 #else
  94                 flags.setUnsafeAlgebra();
  95 #endif
  96                 llvm::unwrap(builder)->setFastMathFlags(flags);
  97                 break;
  98         }
  99
 100         return builder;
 101 }