[RemoveDIs] Update DIBuilder C API with DbgRecord functions. (#95535)

The DIBuilder C API was changed to deal with DbgRecord functions:

#84915
#85657
#92417 (comment)

As discussed by @nikic and @OCHyams:

#92417 (comment)

> For the intrinsic-inserting functions, do you think we should:
>
> a) mark as deprecated but otherwise leave them alone for now.
> b) mark as deprecated and change their behaviour so that they
>    do nothing and return nullptr.
> c) outright delete them (it sounds like you're voting this one,
>    but just wanted to double check).

This patch implements option (c).

Author: CarlosAlbertoEnciso

llvm/bindings/ocaml/debuginfo/debuginfo_ocaml.c

@@ -972,7 +972,7 @@ value llvm_dibuild_create_parameter_variable_bytecode(value *argv, int arg) {
 value llvm_dibuild_insert_declare_before_native(value Builder, value Storage,
                                                 value VarInfo, value Expr,
                                                 value DebugLoc, value Instr) {
-  LLVMDbgRecordRef Value = LLVMDIBuilderInsertDeclareBefore(
+  LLVMDbgRecordRef Value = LLVMDIBuilderInsertDeclareRecordBefore(
       DIBuilder_val(Builder), Value_val(Storage), Metadata_val(VarInfo),
       Metadata_val(Expr), Metadata_val(DebugLoc), Value_val(Instr));
   return to_val(Value);
@@ -992,7 +992,7 @@ value llvm_dibuild_insert_declare_before_bytecode(value *argv, int arg) {
 value llvm_dibuild_insert_declare_at_end_native(value Builder, value Storage,
                                                 value VarInfo, value Expr,
                                                 value DebugLoc, value Block) {
-  LLVMDbgRecordRef Value = LLVMDIBuilderInsertDeclareAtEnd(
+  LLVMDbgRecordRef Value = LLVMDIBuilderInsertDeclareRecordAtEnd(
       DIBuilder_val(Builder), Value_val(Storage), Metadata_val(VarInfo),
       Metadata_val(Expr), Metadata_val(DebugLoc), BasicBlock_val(Block));
   return to_val(Value);

llvm/docs/ReleaseNotes.rst

@@ -220,7 +220,40 @@ Changes to the C API
   * ``LLVMConstICmp``
   * ``LLVMConstFCmp``
 
-* Added ``LLVMPositionBuilderBeforeDbgRecords`` and ``LLVMPositionBuilderBeforeInstrAndDbgRecords``. Same as ``LLVMPositionBuilder`` and ``LLVMPositionBuilderBefore`` except the insertion position is set to before the debug records that precede the target instruction. See the `debug info migration guide <https://llvm.org/docs/RemoveDIsDebugInfo.html>`_ for more info. ``LLVMPositionBuilder`` and ``LLVMPositionBuilderBefore`` are unchanged; they insert before the indicated instruction but after any attached debug records.
+**Note:** The following changes are due to the removal of the debug info
+intrinsics from LLVM and to the introduction of debug records into LLVM.
+They are described in detail in the `debug info migration guide <https://llvm.org/docs/RemoveDIsDebugInfo.html>`_.
+
+* Added the following functions to insert before the indicated instruction but
+  after any attached debug records.
+
+  * ``LLVMPositionBuilderBeforeDbgRecords``
+  * ``LLVMPositionBuilderBeforeInstrAndDbgRecords``
+
+  Same as ``LLVMPositionBuilder`` and ``LLVMPositionBuilderBefore`` except the
+  insertion position is set to before the debug records that precede the target
+  instruction. ``LLVMPositionBuilder`` and ``LLVMPositionBuilderBefore`` are
+  unchanged.
+
+* Added the following functions to get/set the new non-instruction debug info format.
+  They will be deprecated in the future and they are just a transition aid.
+
+  * ``LLVMIsNewDbgInfoFormat``
+  * ``LLVMSetIsNewDbgInfoFormat``
+
+* Added the following functions to insert a debug record (new debug info format).
+
+  * ``LLVMDIBuilderInsertDeclareRecordBefore``
+  * ``LLVMDIBuilderInsertDeclareRecordAtEnd``
+  * ``LLVMDIBuilderInsertDbgValueRecordBefore``
+  * ``LLVMDIBuilderInsertDbgValueRecordAtEnd``
+
+* Deleted the following functions that inserted a debug intrinsic (old debug info format).
+
+  * ``LLVMDIBuilderInsertDeclareBefore``
+  * ``LLVMDIBuilderInsertDeclareAtEnd``
+  * ``LLVMDIBuilderInsertDbgValueBefore``
+  * ``LLVMDIBuilderInsertDbgValueAtEnd``
 
 Changes to the CodeGen infrastructure
 -------------------------------------

llvm/docs/RemoveDIsDebugInfo.md

@@ -140,34 +140,31 @@ Any tests downstream of the main LLVM repo that test the IR output of LLVM may b
 Some new functions that have been added are temporary and will be deprecated in the future. The intention is that they'll help downstream projects adapt during the transition period.
 
 ```
-New functions (all to be deprecated)
-------------------------------------
-LLVMIsNewDbgInfoFormat                      # Returns true if the module is in the new non-instruction mode.
-LLVMSetIsNewDbgInfoFormat                   # Convert to the requested debug info format.
-
-LLVMDIBuilderInsertDeclareIntrinsicBefore   # Insert a debug intrinsic (old debug info format).
-LLVMDIBuilderInsertDeclareIntrinsicAtEnd    # Same as above.
-LLVMDIBuilderInsertDbgValueIntrinsicBefore  # Same as above.
-LLVMDIBuilderInsertDbgValueIntrinsicAtEnd   # Same as above.
-
-LLVMDIBuilderInsertDeclareRecordBefore      # Insert a debug record (new debug info format).
-LLVMDIBuilderInsertDeclareRecordAtEnd       # Same as above.
-LLVMDIBuilderInsertDbgValueRecordBefore     # Same as above.
-LLVMDIBuilderInsertDbgValueRecordAtEnd      # Same as above.
-
-Existing functions (behaviour change)
--------------------------------------
+Deleted functions
+-----------------
 LLVMDIBuilderInsertDeclareBefore   # Insert a debug record (new debug info format) instead of a debug intrinsic (old debug info format).
 LLVMDIBuilderInsertDeclareAtEnd    # Same as above.
 LLVMDIBuilderInsertDbgValueBefore  # Same as above.
 LLVMDIBuilderInsertDbgValueAtEnd   # Same as above.
 
+New functions (to be deprecated)
+--------------------------------
+LLVMIsNewDbgInfoFormat     # Returns true if the module is in the new non-instruction mode.
+LLVMSetIsNewDbgInfoFormat  # Convert to the requested debug info format.
+
 New functions (no plans to deprecate)
-----------------------------------
+-------------------------------------
+LLVMDIBuilderInsertDeclareRecordBefore   # Insert a debug record (new debug info format).
+LLVMDIBuilderInsertDeclareRecordAtEnd    # Same as above. See info below.
+LLVMDIBuilderInsertDbgValueRecordBefore  # Same as above. See info below.
+LLVMDIBuilderInsertDbgValueRecordAtEnd   # Same as above. See info below.
+
 LLVMPositionBuilderBeforeDbgRecords          # See info below.
 LLVMPositionBuilderBeforeInstrAndDbgRecords  # See info below.
 ```
 
+`LLVMDIBuilderInsertDeclareRecordBefore`, `LLVMDIBuilderInsertDeclareRecordAtEnd`, `LLVMDIBuilderInsertDbgValueRecordBefore` and `LLVMDIBuilderInsertDbgValueRecordAtEnd` are replacing the deleted `LLVMDIBuilderInsertDeclareBefore-style` functions.
+
 `LLVMPositionBuilderBeforeDbgRecords` and `LLVMPositionBuilderBeforeInstrAndDbgRecords` behave the same as `LLVMPositionBuilder` and `LLVMPositionBuilderBefore` except the insertion position is set before the debug records that precede the target instruction. Note that this doesn't mean that debug intrinsics before the chosen instruction are skipped, only debug records (which unlike debug records are not themselves instructions).
 
 If you don't know which function to call then follow this rule:

llvm/include/llvm-c/DebugInfo.h

@@ -1261,44 +1261,12 @@ LLVMMetadataRef LLVMDIBuilderCreateTempGlobalVariableFwdDecl(
     unsigned LineNo, LLVMMetadataRef Ty, LLVMBool LocalToUnit,
     LLVMMetadataRef Decl, uint32_t AlignInBits);
 
-/*
- * Insert a new Declare DbgRecord before the given instruction.
- *
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * Use LLVMSetIsNewDbgInfoFormat(LLVMBool) to convert between formats.
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
- *
- * \param Builder     The DIBuilder.
- * \param Storage     The storage of the variable to declare.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Instr       Instruction acting as a location for the new intrinsic.
- */
-LLVMDbgRecordRef
-LLVMDIBuilderInsertDeclareBefore(LLVMDIBuilderRef Builder, LLVMValueRef Storage,
-                                 LLVMMetadataRef VarInfo, LLVMMetadataRef Expr,
-                                 LLVMMetadataRef DebugLoc, LLVMValueRef Instr);
 /**
- * Soon to be deprecated.
- * Only use in "old debug mode" (LLVMIsNewDbgInfoFormat() is false).
+ * Only use in "new debug format" (LLVMIsNewDbgInfoFormat() is true).
  * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
  *
- * Insert a new llvm.dbg.declare intrinsic call before the given instruction.
- * \param Builder     The DIBuilder.
- * \param Storage     The storage of the variable to declare.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Instr       Instruction acting as a location for the new intrinsic.
- */
-LLVMValueRef LLVMDIBuilderInsertDeclareIntrinsicBefore(
-    LLVMDIBuilderRef Builder, LLVMValueRef Storage, LLVMMetadataRef VarInfo,
-    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMValueRef Instr);
-/**
- * Soon to be deprecated.
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
+ * The debug format can be switched later after inserting the records using
+ * LLVMSetIsNewDbgInfoFormat, if needed for legacy or transitionary reasons.
  *
  * Insert a Declare DbgRecord before the given instruction.
  * \param Builder     The DIBuilder.
@@ -1313,46 +1281,11 @@ LLVMDbgRecordRef LLVMDIBuilderInsertDeclareRecordBefore(
     LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMValueRef Instr);
 
 /**
- * Insert a new Declare DbgRecord at the end of the given basic block. If the
- * basic block has a terminator instruction, the intrinsic is inserted before
- * that terminator instruction.
- *
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * Use LLVMSetIsNewDbgInfoFormat(LLVMBool) to convert between formats.
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
- *
- * \param Builder     The DIBuilder.
- * \param Storage     The storage of the variable to declare.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Block       Basic block acting as a location for the new intrinsic.
- */
-LLVMDbgRecordRef LLVMDIBuilderInsertDeclareAtEnd(
-    LLVMDIBuilderRef Builder, LLVMValueRef Storage, LLVMMetadataRef VarInfo,
-    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block);
-/**
- * Soon to be deprecated.
- * Only use in "old debug mode" (LLVMIsNewDbgInfoFormat() is false).
+ * Only use in "new debug format" (LLVMIsNewDbgInfoFormat() is true).
  * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
  *
- * Insert a new llvm.dbg.declare intrinsic call at the end of the given basic
- * block. If the basic block has a terminator instruction, the intrinsic is
- * inserted before that terminator instruction.
- * \param Builder     The DIBuilder.
- * \param Storage     The storage of the variable to declare.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Block       Basic block acting as a location for the new intrinsic.
- */
-LLVMValueRef LLVMDIBuilderInsertDeclareIntrinsicAtEnd(
-    LLVMDIBuilderRef Builder, LLVMValueRef Storage, LLVMMetadataRef VarInfo,
-    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block);
-/**
- * Soon to be deprecated.
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
+ * The debug format can be switched later after inserting the records using
+ * LLVMSetIsNewDbgInfoFormat, if needed for legacy or transitionary reasons.
  *
  * Insert a Declare DbgRecord at the end of the given basic block. If the basic
  * block has a terminator instruction, the record is inserted before that
@@ -1369,107 +1302,40 @@ LLVMDbgRecordRef LLVMDIBuilderInsertDeclareRecordAtEnd(
     LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block);
 
 /**
- * Insert a new Value DbgRecord before the given instruction.
- *
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * Use LLVMSetIsNewDbgInfoFormat(LLVMBool) to convert between formats.
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
- *
- * \param Builder     The DIBuilder.
- * \param Val         The value of the variable.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Instr       Instruction acting as a location for the new intrinsic.
- */
-LLVMDbgRecordRef
-LLVMDIBuilderInsertDbgValueBefore(LLVMDIBuilderRef Builder, LLVMValueRef Val,
-                                  LLVMMetadataRef VarInfo, LLVMMetadataRef Expr,
-                                  LLVMMetadataRef DebugLoc, LLVMValueRef Instr);
-/**
- * Soon to be deprecated.
- * Only use in "old debug mode" (LLVMIsNewDbgInfoFormat() is false).
+ * Only use in "new debug format" (LLVMIsNewDbgInfoFormat() is true).
  * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
  *
- * Insert a new llvm.dbg.value intrinsic call before the given instruction.
- * \param Builder     The DIBuilder.
- * \param Val         The value of the variable.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Instr       Instruction acting as a location for the new intrinsic.
- */
-LLVMValueRef LLVMDIBuilderInsertDbgValueIntrinsicBefore(
-    LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,
-    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMValueRef Instr);
-/**
- * Soon to be deprecated.
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
+ * The debug format can be switched later after inserting the records using
+ * LLVMSetIsNewDbgInfoFormat, if needed for legacy or transitionary reasons.
  *
- * Insert a new llvm.dbg.value intrinsic call before the given instruction.
+ * Insert a new debug record before the given instruction.
  * \param Builder     The DIBuilder.
  * \param Val         The value of the variable.
  * \param VarInfo     The variable's debug info descriptor.
  * \param Expr        A complex location expression for the variable.
  * \param DebugLoc    Debug info location.
- * \param Instr       Instruction acting as a location for the new intrinsic.
+ * \param Instr       Instruction acting as a location for the new record.
  */
 LLVMDbgRecordRef LLVMDIBuilderInsertDbgValueRecordBefore(
     LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,
     LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMValueRef Instr);
 
 /**
- * Insert a new Value DbgRecord at the end of the given basic block. If the
- * basic block has a terminator instruction, the intrinsic is inserted before
- * that terminator instruction.
- *
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * Use LLVMSetIsNewDbgInfoFormat(LLVMBool) to convert between formats.
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
- *
- * \param Builder     The DIBuilder.
- * \param Val         The value of the variable.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Block       Basic block acting as a location for the new intrinsic.
- */
-LLVMDbgRecordRef LLVMDIBuilderInsertDbgValueAtEnd(
-    LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,
-    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block);
-/**
- * Soon to be deprecated.
- * Only use in "old debug mode" (LLVMIsNewDbgInfoFormat() is false).
+ * Only use in "new debug format" (LLVMIsNewDbgInfoFormat() is true).
  * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
  *
- * Insert a new llvm.dbg.value intrinsic call at the end of the given basic
- * block. If the basic block has a terminator instruction, the intrinsic is
- * inserted before that terminator instruction.
- * \param Builder     The DIBuilder.
- * \param Val         The value of the variable.
- * \param VarInfo     The variable's debug info descriptor.
- * \param Expr        A complex location expression for the variable.
- * \param DebugLoc    Debug info location.
- * \param Block       Basic block acting as a location for the new intrinsic.
- */
-LLVMValueRef LLVMDIBuilderInsertDbgValueIntrinsicAtEnd(
-    LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,
-    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block);
-/**
- * Soon to be deprecated.
- * Only use in "new debug mode" (LLVMIsNewDbgInfoFormat() is true).
- * See https://llvm.org/docs/RemoveDIsDebugInfo.html#c-api-changes
+ * The debug format can be switched later after inserting the records using
+ * LLVMSetIsNewDbgInfoFormat, if needed for legacy or transitionary reasons.
  *
- * Insert a new llvm.dbg.value intrinsic call at the end of the given basic
- * block. If the basic block has a terminator instruction, the intrinsic is
- * inserted before that terminator instruction.
+ * Insert a new debug record at the end of the given basic block. If the
+ * basic block has a terminator instruction, the record is inserted before
+ * that terminator instruction.
  * \param Builder     The DIBuilder.
  * \param Val         The value of the variable.
  * \param VarInfo     The variable's debug info descriptor.
  * \param Expr        A complex location expression for the variable.
  * \param DebugLoc    Debug info location.
- * \param Block       Basic block acting as a location for the new intrinsic.
+ * \param Block       Basic block acting as a location for the new record.
  */
 LLVMDbgRecordRef LLVMDIBuilderInsertDbgValueRecordAtEnd(
     LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,