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/*
* llvmjit_emit.h
* Helpers to make emitting LLVM IR a bit more concise and pgindent proof.
*
* Copyright (c) 2018-2023, PostgreSQL Global Development Group
*
* src/include/jit/llvmjit_emit.h
*/
#ifndef LLVMJIT_EMIT_H
#define LLVMJIT_EMIT_H
/*
* To avoid breaking cpluspluscheck, allow including the file even when LLVM
* is not available.
*/
#ifdef USE_LLVM
#include <llvm-c/Core.h>
#include <llvm-c/Target.h>
#include "jit/llvmjit.h"
/*
* Emit a non-LLVM pointer as an LLVM constant.
*/
static inline LLVMValueRef
l_ptr_const(void *ptr, LLVMTypeRef type)
{
LLVMValueRef c = LLVMConstInt(TypeSizeT, (uintptr_t) ptr, false);
return LLVMConstIntToPtr(c, type);
}
/*
* Emit pointer.
*/
static inline LLVMTypeRef
l_ptr(LLVMTypeRef t)
{
return LLVMPointerType(t, 0);
}
/*
* Emit constant integer.
*/
static inline LLVMValueRef
l_int8_const(LLVMContextRef lc, int8 i)
{
return LLVMConstInt(LLVMInt8TypeInContext(lc), i, false);
}
/*
* Emit constant integer.
*/
static inline LLVMValueRef
l_int16_const(LLVMContextRef lc, int16 i)
{
return LLVMConstInt(LLVMInt16TypeInContext(lc), i, false);
}
/*
* Emit constant integer.
*/
static inline LLVMValueRef
l_int32_const(LLVMContextRef lc, int32 i)
{
return LLVMConstInt(LLVMInt32TypeInContext(lc), i, false);
}
/*
* Emit constant integer.
*/
static inline LLVMValueRef
l_int64_const(LLVMContextRef lc, int64 i)
{
return LLVMConstInt(LLVMInt64TypeInContext(lc), i, false);
}
/*
* Emit constant integer.
*/
static inline LLVMValueRef
l_sizet_const(size_t i)
{
return LLVMConstInt(TypeSizeT, i, false);
}
/*
* Emit constant boolean, as used for storage (e.g. global vars, structs).
*/
static inline LLVMValueRef
l_sbool_const(bool i)
{
return LLVMConstInt(TypeStorageBool, (int) i, false);
}
/*
* Emit constant boolean, as used for parameters (e.g. function parameters).
*/
static inline LLVMValueRef
l_pbool_const(bool i)
{
return LLVMConstInt(TypeParamBool, (int) i, false);
}
static inline LLVMValueRef
l_struct_gep(LLVMBuilderRef b, LLVMTypeRef t, LLVMValueRef v, int32 idx, const char *name)
{
#if LLVM_VERSION_MAJOR < 16
return LLVMBuildStructGEP(b, v, idx, "");
#else
return LLVMBuildStructGEP2(b, t, v, idx, "");
#endif
}
static inline LLVMValueRef
l_gep(LLVMBuilderRef b, LLVMTypeRef t, LLVMValueRef v, LLVMValueRef *indices, int32 nindices, const char *name)
{
#if LLVM_VERSION_MAJOR < 16
return LLVMBuildGEP(b, v, indices, nindices, name);
#else
return LLVMBuildGEP2(b, t, v, indices, nindices, name);
#endif
}
static inline LLVMValueRef
l_load(LLVMBuilderRef b, LLVMTypeRef t, LLVMValueRef v, const char *name)
{
#if LLVM_VERSION_MAJOR < 16
return LLVMBuildLoad(b, v, name);
#else
return LLVMBuildLoad2(b, t, v, name);
#endif
}
static inline LLVMValueRef
l_call(LLVMBuilderRef b, LLVMTypeRef t, LLVMValueRef fn, LLVMValueRef *args, int32 nargs, const char *name)
{
#if LLVM_VERSION_MAJOR < 16
return LLVMBuildCall(b, fn, args, nargs, name);
#else
return LLVMBuildCall2(b, t, fn, args, nargs, name);
#endif
}
/*
* Load a pointer member idx from a struct.
*/
static inline LLVMValueRef
l_load_struct_gep(LLVMBuilderRef b, LLVMTypeRef t, LLVMValueRef v, int32 idx, const char *name)
{
return l_load(b,
LLVMStructGetTypeAtIndex(t, idx),
l_struct_gep(b, t, v, idx, ""),
name);
}
/*
* Load value of a pointer, after applying one index operation.
*/
static inline LLVMValueRef
l_load_gep1(LLVMBuilderRef b, LLVMTypeRef t, LLVMValueRef v, LLVMValueRef idx, const char *name)
{
return l_load(b, t, l_gep(b, t, v, &idx, 1, ""), name);
}
/* separate, because pg_attribute_printf(2, 3) can't appear in definition */
static inline LLVMBasicBlockRef l_bb_before_v(LLVMBasicBlockRef r, const char *fmt,...) pg_attribute_printf(2, 3);
/*
* Insert a new basic block, just before r, the name being determined by fmt
* and arguments.
*/
static inline LLVMBasicBlockRef
l_bb_before_v(LLVMBasicBlockRef r, const char *fmt,...)
{
char buf[512];
va_list args;
LLVMContextRef lc;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
lc = LLVMGetTypeContext(LLVMTypeOf(LLVMGetBasicBlockParent(r)));
return LLVMInsertBasicBlockInContext(lc, r, buf);
}
/* separate, because pg_attribute_printf(2, 3) can't appear in definition */
static inline LLVMBasicBlockRef l_bb_append_v(LLVMValueRef f, const char *fmt,...) pg_attribute_printf(2, 3);
/*
* Insert a new basic block after previous basic blocks, the name being
* determined by fmt and arguments.
*/
static inline LLVMBasicBlockRef
l_bb_append_v(LLVMValueRef f, const char *fmt,...)
{
char buf[512];
va_list args;
LLVMContextRef lc;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
lc = LLVMGetTypeContext(LLVMTypeOf(f));
return LLVMAppendBasicBlockInContext(lc, f, buf);
}
/*
* Mark a callsite as readonly.
*/
static inline void
l_callsite_ro(LLVMValueRef f)
{
const char argname[] = "readonly";
LLVMAttributeRef ref;
ref = LLVMCreateStringAttribute(LLVMGetTypeContext(LLVMTypeOf(f)),
argname,
sizeof(argname) - 1,
NULL, 0);
LLVMAddCallSiteAttribute(f, LLVMAttributeFunctionIndex, ref);
}
/*
* Mark a callsite as alwaysinline.
*/
static inline void
l_callsite_alwaysinline(LLVMValueRef f)
{
const char argname[] = "alwaysinline";
int id;
LLVMAttributeRef attr;
id = LLVMGetEnumAttributeKindForName(argname,
sizeof(argname) - 1);
attr = LLVMCreateEnumAttribute(LLVMGetTypeContext(LLVMTypeOf(f)), id, 0);
LLVMAddCallSiteAttribute(f, LLVMAttributeFunctionIndex, attr);
}
/*
* Emit code to switch memory context.
*/
static inline LLVMValueRef
l_mcxt_switch(LLVMModuleRef mod, LLVMBuilderRef b, LLVMValueRef nc)
{
const char *cmc = "CurrentMemoryContext";
LLVMValueRef cur;
LLVMValueRef ret;
if (!(cur = LLVMGetNamedGlobal(mod, cmc)))
cur = LLVMAddGlobal(mod, l_ptr(StructMemoryContextData), cmc);
ret = l_load(b, l_ptr(StructMemoryContextData), cur, cmc);
LLVMBuildStore(b, nc, cur);
return ret;
}
/*
* Return pointer to the argno'th argument nullness.
*/
static inline LLVMValueRef
l_funcnullp(LLVMBuilderRef b, LLVMValueRef v_fcinfo, size_t argno)
{
LLVMValueRef v_args;
LLVMValueRef v_argn;
v_args = l_struct_gep(b,
StructFunctionCallInfoData,
v_fcinfo,
FIELDNO_FUNCTIONCALLINFODATA_ARGS,
"");
v_argn = l_struct_gep(b,
LLVMArrayType(StructNullableDatum, 0),
v_args,
argno,
"");
return l_struct_gep(b,
StructNullableDatum,
v_argn,
FIELDNO_NULLABLE_DATUM_ISNULL,
"");
}
/*
* Return pointer to the argno'th argument datum.
*/
static inline LLVMValueRef
l_funcvaluep(LLVMBuilderRef b, LLVMValueRef v_fcinfo, size_t argno)
{
LLVMValueRef v_args;
LLVMValueRef v_argn;
v_args = l_struct_gep(b,
StructFunctionCallInfoData,
v_fcinfo,
FIELDNO_FUNCTIONCALLINFODATA_ARGS,
"");
v_argn = l_struct_gep(b,
LLVMArrayType(StructNullableDatum, 0),
v_args,
argno,
"");
return l_struct_gep(b,
StructNullableDatum,
v_argn,
FIELDNO_NULLABLE_DATUM_DATUM,
"");
}
/*
* Return argno'th argument nullness.
*/
static inline LLVMValueRef
l_funcnull(LLVMBuilderRef b, LLVMValueRef v_fcinfo, size_t argno)
{
return l_load(b, TypeStorageBool, l_funcnullp(b, v_fcinfo, argno), "");
}
/*
* Return argno'th argument datum.
*/
static inline LLVMValueRef
l_funcvalue(LLVMBuilderRef b, LLVMValueRef v_fcinfo, size_t argno)
{
return l_load(b, TypeSizeT, l_funcvaluep(b, v_fcinfo, argno), "");
}
#endif /* USE_LLVM */
#endif