llvm/tools/llvm-c-test/metadata.c

   1 /*===-- object.c - tool for testing libLLVM and llvm-c API ----------------===*\
   2 |*                                                                            *|
   3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
   4 |* Exceptions.                                                                *|
   5 |* See https://llvm.org/LICENSE.txt for license information.                  *|
   6 |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
   7 |*                                                                            *|
   8 |*===----------------------------------------------------------------------===*|
   9 |*                                                                            *|
  10 |* This file implements the --add-named-metadata-operand and --set-metadata   *|
  11 |* commands in llvm-c-test.                                                   *|
  12 |*                                                                            *|
  13 \*===----------------------------------------------------------------------===*/
  14
  15 #include "llvm-c-test.h"
  16 #include "llvm-c/Types.h"
  17
  18 #include <assert.h>
  19 #include <string.h>
  20
  21 int llvm_add_named_metadata_operand(void) {
  22   LLVMModuleRef M = LLVMModuleCreateWithName("Mod");
  23   LLVMValueRef Int = LLVMConstInt(LLVMInt32Type(), 0, 0);
  24
  25   // This used to trigger an assertion
  26   LLVMAddNamedMetadataOperand(M, "name", LLVMMDNode(&Int, 1));
  27
  28   LLVMDisposeModule(M);
  29
  30   return 0;
  31 }
  32
  33 int llvm_set_metadata(void) {
  34   LLVMBuilderRef Builder = LLVMCreateBuilder();
  35
  36   // This used to trigger an assertion
  37   LLVMValueRef Return = LLVMBuildRetVoid(Builder);
  38
  39   const char Name[] = "kind";
  40   LLVMValueRef Int = LLVMConstInt(LLVMInt32Type(), 0, 0);
  41   LLVMSetMetadata(Return, LLVMGetMDKindID(Name, strlen(Name)),
  42                   LLVMMDNode(&Int, 1));
  43
  44   LLVMDisposeBuilder(Builder);
  45   LLVMDeleteInstruction(Return);
  46
  47   return 0;
  48 }
  49
  50 int llvm_replace_md_operand(void) {
  51   LLVMModuleRef M = LLVMModuleCreateWithName("Mod");
  52   LLVMContextRef Context = LLVMGetModuleContext(M);
  53
  54   const char String1[] = "foo";
  55   LLVMMetadataRef String1MD =
  56       LLVMMDStringInContext2(Context, String1, strlen(String1));
  57   LLVMMetadataRef NodeMD = LLVMMDNodeInContext2(Context, &String1MD, 1);
  58   LLVMValueRef Value = LLVMMetadataAsValue(Context, NodeMD);
  59
  60   const char String2[] = "bar";
  61   LLVMMetadataRef String2MD =
  62       LLVMMDStringInContext2(Context, String2, strlen(String2));
  63   LLVMReplaceMDNodeOperandWith(Value, 0, String2MD);
  64
  65   LLVMValueRef Operand = LLVMGetOperand(Value, 0);
  66
  67   unsigned int Len;
  68   const char *String = LLVMGetMDString(Operand, &Len);
  69   assert(Len == strlen(String2));
  70   assert(strncmp(String, String2, Len) == 0);
  71   (void)String;
  72
  73   LLVMDisposeModule(M);
  74
  75   return 0;
  76 }
  77
  78 int llvm_is_a_value_as_metadata(void) {
  79   LLVMModuleRef M = LLVMModuleCreateWithName("Mod");
  80   LLVMContextRef Context = LLVMGetModuleContext(M);
  81
  82   {
  83     LLVMValueRef Int = LLVMConstInt(LLVMInt32Type(), 0, 0);
  84     LLVMValueRef NodeMD = LLVMMDNode(&Int, 1);
  85     assert(LLVMIsAValueAsMetadata(NodeMD) == NodeMD);
  86     (void)NodeMD;
  87   }
  88
  89   {
  90     const char String[] = "foo";
  91     LLVMMetadataRef StringMD =
  92         LLVMMDStringInContext2(Context, String, strlen(String));
  93     LLVMMetadataRef NodeMD = LLVMMDNodeInContext2(Context, &StringMD, 1);
  94     LLVMValueRef Value = LLVMMetadataAsValue(Context, NodeMD);
  95     assert(LLVMIsAValueAsMetadata(Value) == NULL);
  96     (void)Value;
  97   }
  98
  99   return 0;
 100 }