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      1 /**************************************************************************
      2  *
      3  * Copyright 2009 VMware, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 
     29 /**
     30  * @file
     31  * Helper functions for manipulation structures.
     32  *
     33  * @author Jose Fonseca <jfonseca (at) vmware.com>
     34  */
     35 
     36 
     37 #include "util/u_debug.h"
     38 #include "util/u_memory.h"
     39 
     40 #include "lp_bld_const.h"
     41 #include "lp_bld_debug.h"
     42 #include "lp_bld_struct.h"
     43 
     44 
     45 LLVMValueRef
     46 lp_build_struct_get_ptr(struct gallivm_state *gallivm,
     47                         LLVMValueRef ptr,
     48                         unsigned member,
     49                         const char *name)
     50 {
     51    LLVMValueRef indices[2];
     52    LLVMValueRef member_ptr;
     53    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
     54    assert(LLVMGetTypeKind(LLVMGetElementType(LLVMTypeOf(ptr))) == LLVMStructTypeKind);
     55    indices[0] = lp_build_const_int32(gallivm, 0);
     56    indices[1] = lp_build_const_int32(gallivm, member);
     57    member_ptr = LLVMBuildGEP(gallivm->builder, ptr, indices, ARRAY_SIZE(indices), "");
     58    lp_build_name(member_ptr, "%s.%s_ptr", LLVMGetValueName(ptr), name);
     59    return member_ptr;
     60 }
     61 
     62 
     63 LLVMValueRef
     64 lp_build_struct_get(struct gallivm_state *gallivm,
     65                     LLVMValueRef ptr,
     66                     unsigned member,
     67                     const char *name)
     68 {
     69    LLVMValueRef member_ptr;
     70    LLVMValueRef res;
     71    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
     72    assert(LLVMGetTypeKind(LLVMGetElementType(LLVMTypeOf(ptr))) == LLVMStructTypeKind);
     73    member_ptr = lp_build_struct_get_ptr(gallivm, ptr, member, name);
     74    res = LLVMBuildLoad(gallivm->builder, member_ptr, "");
     75    lp_build_name(res, "%s.%s", LLVMGetValueName(ptr), name);
     76    return res;
     77 }
     78 
     79 
     80 LLVMValueRef
     81 lp_build_array_get_ptr(struct gallivm_state *gallivm,
     82                        LLVMValueRef ptr,
     83                        LLVMValueRef index)
     84 {
     85    LLVMValueRef indices[2];
     86    LLVMValueRef element_ptr;
     87    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
     88    assert(LLVMGetTypeKind(LLVMGetElementType(LLVMTypeOf(ptr))) == LLVMArrayTypeKind);
     89    indices[0] = lp_build_const_int32(gallivm, 0);
     90    indices[1] = index;
     91    element_ptr = LLVMBuildGEP(gallivm->builder, ptr, indices, ARRAY_SIZE(indices), "");
     92 #ifdef DEBUG
     93    lp_build_name(element_ptr, "&%s[%s]",
     94                  LLVMGetValueName(ptr), LLVMGetValueName(index));
     95 #endif
     96    return element_ptr;
     97 }
     98 
     99 
    100 LLVMValueRef
    101 lp_build_array_get(struct gallivm_state *gallivm,
    102                    LLVMValueRef ptr,
    103                    LLVMValueRef index)
    104 {
    105    LLVMValueRef element_ptr;
    106    LLVMValueRef res;
    107    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
    108    assert(LLVMGetTypeKind(LLVMGetElementType(LLVMTypeOf(ptr))) == LLVMArrayTypeKind);
    109    element_ptr = lp_build_array_get_ptr(gallivm, ptr, index);
    110    res = LLVMBuildLoad(gallivm->builder, element_ptr, "");
    111 #ifdef DEBUG
    112    lp_build_name(res, "%s[%s]", LLVMGetValueName(ptr), LLVMGetValueName(index));
    113 #endif
    114    return res;
    115 }
    116 
    117 
    118 void
    119 lp_build_array_set(struct gallivm_state *gallivm,
    120                    LLVMValueRef ptr,
    121                    LLVMValueRef index,
    122                    LLVMValueRef value)
    123 {
    124    LLVMValueRef element_ptr;
    125    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
    126    assert(LLVMGetTypeKind(LLVMGetElementType(LLVMTypeOf(ptr))) == LLVMArrayTypeKind);
    127    element_ptr = lp_build_array_get_ptr(gallivm, ptr, index);
    128    LLVMBuildStore(gallivm->builder, value, element_ptr);
    129 }
    130 
    131 
    132 LLVMValueRef
    133 lp_build_pointer_get(LLVMBuilderRef builder,
    134                      LLVMValueRef ptr,
    135                      LLVMValueRef index)
    136 {
    137    LLVMValueRef element_ptr;
    138    LLVMValueRef res;
    139    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
    140    element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
    141    res = LLVMBuildLoad(builder, element_ptr, "");
    142 #ifdef DEBUG
    143    lp_build_name(res, "%s[%s]", LLVMGetValueName(ptr), LLVMGetValueName(index));
    144 #endif
    145    return res;
    146 }
    147 
    148 
    149 LLVMValueRef
    150 lp_build_pointer_get_unaligned(LLVMBuilderRef builder,
    151                                LLVMValueRef ptr,
    152                                LLVMValueRef index,
    153                                unsigned alignment)
    154 {
    155    LLVMValueRef element_ptr;
    156    LLVMValueRef res;
    157    assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
    158    element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
    159    res = LLVMBuildLoad(builder, element_ptr, "");
    160    LLVMSetAlignment(res, alignment);
    161 #ifdef DEBUG
    162    lp_build_name(res, "%s[%s]", LLVMGetValueName(ptr), LLVMGetValueName(index));
    163 #endif
    164    return res;
    165 }
    166 
    167 
    168 void
    169 lp_build_pointer_set(LLVMBuilderRef builder,
    170                      LLVMValueRef ptr,
    171                      LLVMValueRef index,
    172                      LLVMValueRef value)
    173 {
    174    LLVMValueRef element_ptr;
    175    element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
    176    LLVMBuildStore(builder, value, element_ptr);
    177 }
    178 
    179 
    180 void
    181 lp_build_pointer_set_unaligned(LLVMBuilderRef builder,
    182                                LLVMValueRef ptr,
    183                                LLVMValueRef index,
    184                                LLVMValueRef value,
    185                                unsigned alignment)
    186 {
    187    LLVMValueRef element_ptr;
    188    LLVMValueRef instr;
    189    element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
    190    instr = LLVMBuildStore(builder, value, element_ptr);
    191    LLVMSetAlignment(instr, alignment);
    192 }
    193