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5b721561aa
Previously, subprograms contained a metadata reference to the function they described. Because most clients need to get or set a subprogram for a given function rather than the other way around, this created unneeded inefficiency. For example, many passes needed to call the function llvm::makeSubprogramMap() to build a mapping from functions to subprograms, and the IR linker needed to fix up function references in a way that caused quadratic complexity in the IR linking phase of LTO. This change reverses the direction of the edge by storing the subprogram as function-level metadata and removing DISubprogram's function field. Since this is an IR change, a bitcode upgrade has been provided. Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is attached to the PR. Differential Revision: http://reviews.llvm.org/D14265 llvm-svn: 252219
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
//===- IRBindings.h - Additional bindings for IR ----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines additional C bindings for the IR component.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_BINDINGS_GO_LLVM_IRBINDINGS_H
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#define LLVM_BINDINGS_GO_LLVM_IRBINDINGS_H
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#include "llvm-c/Core.h"
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#ifdef __cplusplus
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#include "llvm/IR/Metadata.h"
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#include "llvm/Support/CBindingWrapping.h"
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#endif
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct LLVMOpaqueMetadata *LLVMMetadataRef;
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// These functions duplicate the LLVM*FunctionAttr functions in the stable C
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// API. We cannot use the existing functions because they take 32-bit attribute
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// values, and the Go bindings expose all of the LLVM attributes, some of which
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// have values >= 1<<32.
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void LLVMAddFunctionAttr2(LLVMValueRef Fn, uint64_t PA);
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uint64_t LLVMGetFunctionAttr2(LLVMValueRef Fn);
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void LLVMRemoveFunctionAttr2(LLVMValueRef Fn, uint64_t PA);
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LLVMMetadataRef LLVMConstantAsMetadata(LLVMValueRef Val);
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LLVMMetadataRef LLVMMDString2(LLVMContextRef C, const char *Str, unsigned SLen);
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LLVMMetadataRef LLVMMDNode2(LLVMContextRef C, LLVMMetadataRef *MDs,
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unsigned Count);
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LLVMMetadataRef LLVMTemporaryMDNode(LLVMContextRef C, LLVMMetadataRef *MDs,
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unsigned Count);
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void LLVMAddNamedMetadataOperand2(LLVMModuleRef M, const char *name,
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LLVMMetadataRef Val);
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void LLVMSetMetadata2(LLVMValueRef Inst, unsigned KindID, LLVMMetadataRef MD);
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void LLVMMetadataReplaceAllUsesWith(LLVMMetadataRef MD, LLVMMetadataRef New);
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void LLVMSetCurrentDebugLocation2(LLVMBuilderRef Bref, unsigned Line,
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unsigned Col, LLVMMetadataRef Scope,
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LLVMMetadataRef InlinedAt);
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void LLVMSetSubprogram(LLVMValueRef Fn, LLVMMetadataRef SP);
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#ifdef __cplusplus
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}
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namespace llvm {
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DEFINE_ISA_CONVERSION_FUNCTIONS(Metadata, LLVMMetadataRef)
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inline Metadata **unwrap(LLVMMetadataRef *Vals) {
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return reinterpret_cast<Metadata**>(Vals);
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}
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}
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#endif
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#endif
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