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sparse-llvm.c
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sparse-llvm.c
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/*
* Example usage:
* ./sparse-llvm hello.c | llc | as -o hello.o
*/
#include <llvm-c/Core.h>
#include <llvm-c/BitWriter.h>
#include <llvm-c/Analysis.h>
#include <llvm-c/Target.h>
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include "symbol.h"
#include "expression.h"
#include "linearize.h"
#include "flow.h"
struct function {
LLVMBuilderRef builder;
LLVMValueRef fn;
LLVMModuleRef module;
};
static LLVMTypeRef symbol_type(struct symbol *sym);
static LLVMTypeRef func_return_type(struct symbol *sym)
{
if (sym->type == SYM_NODE)
sym = sym->ctype.base_type;
return symbol_type(sym->ctype.base_type);
}
#if LLVM_VERSION_MAJOR > 14
// A call can be done either with a SYM_FN or a SYM_PTR (pointing to a SYM_FN).
// Return the type corresponding to the SYM_FN.
static LLVMTypeRef func_full_type(struct symbol *type)
{
if (type->type == SYM_NODE) {
struct symbol *btype = type->ctype.base_type;
if (btype->type == SYM_PTR)
type = btype->ctype.base_type;
}
return symbol_type(type);
}
#endif
static LLVMTypeRef sym_func_type(struct symbol *sym)
{
int n_arg = symbol_list_size(sym->arguments);
LLVMTypeRef *arg_type = calloc(n_arg, sizeof(LLVMTypeRef));
LLVMTypeRef ret_type = func_return_type(sym);
struct symbol *arg;
int idx = 0;
FOR_EACH_PTR(sym->arguments, arg) {
struct symbol *arg_sym = arg->ctype.base_type;
arg_type[idx++] = symbol_type(arg_sym);
} END_FOR_EACH_PTR(arg);
return LLVMFunctionType(ret_type, arg_type, n_arg, sym->variadic);
}
static LLVMTypeRef sym_array_type(struct symbol *sym)
{
LLVMTypeRef elem_type;
struct symbol *base_type;
base_type = sym->ctype.base_type;
/* empty struct is undefined [6.7.2.1(8)] */
assert(base_type->bit_size > 0);
elem_type = symbol_type(base_type);
if (!elem_type)
return NULL;
return LLVMArrayType(elem_type, sym->bit_size / base_type->bit_size);
}
#define MAX_STRUCT_MEMBERS 64
static LLVMTypeRef sym_struct_type(struct symbol *sym)
{
LLVMTypeRef elem_types[MAX_STRUCT_MEMBERS];
struct symbol *member;
char buffer[256];
LLVMTypeRef ret;
unsigned nr = 0;
snprintf(buffer, sizeof(buffer), "struct.%s", sym->ident ? sym->ident->name : "anno");
ret = LLVMStructCreateNamed(LLVMGetGlobalContext(), buffer);
/* set ->aux to avoid recursion */
sym->aux = ret;
FOR_EACH_PTR(sym->symbol_list, member) {
LLVMTypeRef member_type;
assert(nr < MAX_STRUCT_MEMBERS);
member_type = symbol_type(member);
elem_types[nr++] = member_type;
} END_FOR_EACH_PTR(member);
LLVMStructSetBody(ret, elem_types, nr, 0 /* packed? */);
return ret;
}
static LLVMTypeRef sym_union_type(struct symbol *sym)
{
LLVMTypeRef elements;
unsigned union_size;
/*
* There's no union support in the LLVM API so we treat unions as
* opaque structs. The downside is that we lose type information on the
* members but as LLVM doesn't care, neither do we.
*/
union_size = sym->bit_size / 8;
elements = LLVMArrayType(LLVMInt8Type(), union_size);
return LLVMStructType(&elements, 1, 0 /* packed? */);
}
static LLVMTypeRef sym_ptr_type(struct symbol *sym)
{
LLVMTypeRef type;
/* 'void *' is treated like 'char *' */
if (is_void_type(sym->ctype.base_type))
type = LLVMInt8Type();
else
type = symbol_type(sym->ctype.base_type);
return LLVMPointerType(type, 0);
}
static LLVMTypeRef sym_basetype_type(struct symbol *sym)
{
LLVMTypeRef ret = NULL;
if (is_float_type(sym)) {
switch (sym->bit_size) {
case 32:
ret = LLVMFloatType();
break;
case 64:
ret = LLVMDoubleType();
break;
case 80:
ret = LLVMX86FP80Type();
break;
default:
die("invalid bit size %d for type %d", sym->bit_size, sym->type);
break;
}
} else {
switch (sym->bit_size) {
case -1:
ret = LLVMVoidType();
break;
case 1:
ret = LLVMInt1Type();
break;
case 8:
ret = LLVMInt8Type();
break;
case 16:
ret = LLVMInt16Type();
break;
case 32:
ret = LLVMInt32Type();
break;
case 64:
ret = LLVMInt64Type();
break;
default:
die("invalid bit size %d for type %d", sym->bit_size, sym->type);
break;
}
}
return ret;
}
static LLVMTypeRef symbol_type(struct symbol *sym)
{
LLVMTypeRef ret = NULL;
/* don't cache the result for SYM_NODE */
if (sym->type == SYM_NODE)
sym = sym->ctype.base_type;
if (sym->aux)
return sym->aux;
switch (sym->type) {
case SYM_BITFIELD:
ret = LLVMIntType(sym->bit_size);
break;
case SYM_RESTRICT:
case SYM_ENUM:
ret = symbol_type(sym->ctype.base_type);
break;
case SYM_BASETYPE:
ret = sym_basetype_type(sym);
break;
case SYM_PTR:
ret = sym_ptr_type(sym);
break;
case SYM_UNION:
ret = sym_union_type(sym);
break;
case SYM_STRUCT:
ret = sym_struct_type(sym);
break;
case SYM_ARRAY:
ret = sym_array_type(sym);
break;
case SYM_FN:
ret = sym_func_type(sym);
break;
default:
assert(0);
}
/* cache the result */
sym->aux = ret;
return ret;
}
static LLVMTypeRef insn_symbol_type(struct instruction *insn)
{
if (insn->type)
return symbol_type(insn->type);
switch (insn->size) {
case 8: return LLVMInt8Type();
case 16: return LLVMInt16Type();
case 32: return LLVMInt32Type();
case 64: return LLVMInt64Type();
default:
die("invalid bit size %d", insn->size);
break;
}
return NULL; /* not reached */
}
static LLVMLinkage data_linkage(struct symbol *sym)
{
if (sym->ctype.modifiers & MOD_STATIC)
return LLVMPrivateLinkage;
return LLVMExternalLinkage;
}
static LLVMLinkage function_linkage(struct symbol *sym)
{
if (sym->ctype.modifiers & MOD_STATIC)
return LLVMInternalLinkage;
return LLVMExternalLinkage;
}
#define MAX_PSEUDO_NAME 64
static const char *pseudo_name(pseudo_t pseudo, char *buf)
{
switch (pseudo->type) {
case PSEUDO_REG:
snprintf(buf, MAX_PSEUDO_NAME, "R%d.", pseudo->nr);
break;
case PSEUDO_PHI:
snprintf(buf, MAX_PSEUDO_NAME, "PHI%d.", pseudo->nr);
break;
case PSEUDO_SYM:
case PSEUDO_VAL:
case PSEUDO_ARG:
case PSEUDO_VOID:
buf[0] = '\0';
break;
case PSEUDO_UNDEF:
assert(0);
break;
default:
assert(0);
}
return buf;
}
static LLVMValueRef get_sym_value(LLVMModuleRef module, struct symbol *sym)
{
const char *name = show_ident(sym->ident);
LLVMTypeRef type = symbol_type(sym);
LLVMValueRef result = NULL;
struct expression *expr;
assert(sym->bb_target == NULL);
expr = sym->initializer;
if (expr && !sym->ident) {
switch (expr->type) {
case EXPR_STRING: {
const char *s = expr->string->data;
size_t len = expr->string->length;
LLVMValueRef indices[] = { LLVMConstInt(LLVMInt64Type(), 0, 0), LLVMConstInt(LLVMInt64Type(), 0, 0) };
LLVMValueRef data;
data = LLVMAddGlobal(module, LLVMArrayType(LLVMInt8Type(), len), ".str");
LLVMSetLinkage(data, LLVMPrivateLinkage);
LLVMSetGlobalConstant(data, 1);
LLVMSetInitializer(data, LLVMConstString(s, len, true));
#if LLVM_VERSION_MAJOR > 14
result = LLVMConstGEP2(LLVMTypeOf(data), data, indices, ARRAY_SIZE(indices));
#else
result = LLVMConstGEP(data, indices, ARRAY_SIZE(indices));
#endif
return result;
}
default:
break;
}
}
if (LLVMGetTypeKind(type) == LLVMFunctionTypeKind) {
result = LLVMGetNamedFunction(module, name);
if (!result)
result = LLVMAddFunction(module, name, type);
} else {
result = LLVMGetNamedGlobal(module, name);
if (!result)
result = LLVMAddGlobal(module, type, name);
}
return result;
}
static LLVMValueRef constant_value(unsigned long long val, LLVMTypeRef dtype)
{
LLVMValueRef result;
switch (LLVMGetTypeKind(dtype)) {
case LLVMPointerTypeKind:
if (val != 0) { // for example: ... = (void*) 0x123;
LLVMTypeRef itype = LLVMIntType(bits_in_pointer);
result = LLVMConstInt(itype, val, 1);
result = LLVMConstIntToPtr(result, dtype);
} else {
result = LLVMConstPointerNull(dtype);
}
break;
case LLVMIntegerTypeKind:
result = LLVMConstInt(dtype, val, 1);
break;
case LLVMArrayTypeKind:
case LLVMStructTypeKind:
if (val != 0)
return NULL;
result = LLVMConstNull(dtype);
break;
default:
return NULL;
}
return result;
}
static LLVMValueRef val_to_value(unsigned long long val, struct symbol *ctype)
{
LLVMValueRef result;
LLVMTypeRef dtype;
assert(ctype);
dtype = symbol_type(ctype);
result = constant_value(val, dtype);
if (result)
return result;
sparse_error(ctype->pos, "no value possible for %s", show_typename(ctype));
return LLVMGetUndef(symbol_type(ctype));
}
static LLVMValueRef pseudo_to_value(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
{
LLVMValueRef result = NULL;
switch (pseudo->type) {
case PSEUDO_REG:
result = pseudo->priv;
break;
case PSEUDO_SYM:
result = get_sym_value(fn->module, pseudo->sym);
break;
case PSEUDO_VAL:
result = val_to_value(pseudo->value, ctype);
break;
case PSEUDO_ARG: {
result = LLVMGetParam(fn->fn, pseudo->nr - 1);
break;
}
case PSEUDO_PHI:
result = pseudo->priv;
break;
case PSEUDO_VOID:
result = NULL;
break;
case PSEUDO_UNDEF:
result = LLVMGetUndef(symbol_type(ctype));
break;
default:
assert(0);
}
return result;
}
static LLVMValueRef pseudo_to_rvalue(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
{
LLVMValueRef val = pseudo_to_value(fn, ctype, pseudo);
LLVMTypeRef dtype = symbol_type(ctype);
char name[MAX_PSEUDO_NAME];
pseudo_name(pseudo, name);
return LLVMBuildBitCast(fn->builder, val, dtype, name);
}
static LLVMValueRef value_to_ivalue(struct function *fn, struct symbol *ctype, LLVMValueRef val)
{
const char *name = LLVMGetValueName(val);
LLVMTypeRef dtype = symbol_type(ctype);
if (LLVMGetTypeKind(LLVMTypeOf(val)) == LLVMPointerTypeKind) {
LLVMTypeRef dtype = LLVMIntType(bits_in_pointer);
val = LLVMBuildPtrToInt(fn->builder, val, dtype, name);
}
if (ctype && is_int_type(ctype)) {
val = LLVMBuildIntCast(fn->builder, val, dtype, name);
}
return val;
}
static LLVMValueRef value_to_pvalue(struct function *fn, struct symbol *ctype, LLVMValueRef val)
{
const char *name = LLVMGetValueName(val);
LLVMTypeRef dtype = symbol_type(ctype);
assert(is_ptr_type(ctype));
switch (LLVMGetTypeKind(LLVMTypeOf(val))) {
case LLVMIntegerTypeKind:
val = LLVMBuildIntToPtr(fn->builder, val, dtype, name);
break;
case LLVMPointerTypeKind:
val = LLVMBuildBitCast(fn->builder, val, dtype, name);
break;
default:
break;
}
return val;
}
static LLVMValueRef adjust_type(struct function *fn, struct symbol *ctype, LLVMValueRef val)
{
if (is_int_type(ctype))
return value_to_ivalue(fn, ctype, val);
if (is_ptr_type(ctype))
return value_to_pvalue(fn, ctype, val);
return val;
}
/*
* Get the LLVMValue corresponding to the pseudo
* and force the type corresponding to ctype.
*/
static LLVMValueRef get_operand(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
{
LLVMValueRef target = pseudo_to_value(fn, ctype, pseudo);
return adjust_type(fn, ctype, target);
}
/*
* Get the LLVMValue corresponding to the pseudo
* and force the type corresponding to ctype but
* map all pointers to intptr_t.
*/
static LLVMValueRef get_ioperand(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
{
LLVMValueRef target = pseudo_to_value(fn, ctype, pseudo);
return value_to_ivalue(fn, ctype, target);
}
static LLVMValueRef calc_gep(LLVMBuilderRef builder, LLVMValueRef base, LLVMValueRef off)
{
LLVMTypeRef type = LLVMTypeOf(base);
unsigned int as = LLVMGetPointerAddressSpace(type);
LLVMTypeRef bytep = LLVMPointerType(LLVMInt8Type(), as);
LLVMValueRef addr;
const char *name = LLVMGetValueName(off);
/* convert base to char* type */
base = LLVMBuildPointerCast(builder, base, bytep, name);
/* addr = base + off */
#if LLVM_VERSION_MAJOR > 14
addr = LLVMBuildInBoundsGEP2(builder, LLVMTypeOf(base), base, &off, 1, name);
#else
addr = LLVMBuildInBoundsGEP(builder, base, &off, 1, name);
#endif
/* convert back to the actual pointer type */
addr = LLVMBuildPointerCast(builder, addr, type, name);
return addr;
}
static LLVMRealPredicate translate_fop(int opcode)
{
static const LLVMRealPredicate trans_tbl[] = {
[OP_FCMP_ORD] = LLVMRealORD,
[OP_FCMP_OEQ] = LLVMRealOEQ,
[OP_FCMP_ONE] = LLVMRealONE,
[OP_FCMP_OLE] = LLVMRealOLE,
[OP_FCMP_OGE] = LLVMRealOGE,
[OP_FCMP_OLT] = LLVMRealOLT,
[OP_FCMP_OGT] = LLVMRealOGT,
[OP_FCMP_UEQ] = LLVMRealUEQ,
[OP_FCMP_UNE] = LLVMRealUNE,
[OP_FCMP_ULE] = LLVMRealULE,
[OP_FCMP_UGE] = LLVMRealUGE,
[OP_FCMP_ULT] = LLVMRealULT,
[OP_FCMP_UGT] = LLVMRealUGT,
[OP_FCMP_UNO] = LLVMRealUNO,
};
return trans_tbl[opcode];
}
static LLVMIntPredicate translate_op(int opcode)
{
static const LLVMIntPredicate trans_tbl[] = {
[OP_SET_EQ] = LLVMIntEQ,
[OP_SET_NE] = LLVMIntNE,
[OP_SET_LE] = LLVMIntSLE,
[OP_SET_GE] = LLVMIntSGE,
[OP_SET_LT] = LLVMIntSLT,
[OP_SET_GT] = LLVMIntSGT,
[OP_SET_B] = LLVMIntULT,
[OP_SET_A] = LLVMIntUGT,
[OP_SET_BE] = LLVMIntULE,
[OP_SET_AE] = LLVMIntUGE,
};
return trans_tbl[opcode];
}
static void output_op_binary(struct function *fn, struct instruction *insn)
{
LLVMValueRef lhs, rhs, target;
char target_name[64];
lhs = get_ioperand(fn, insn->type, insn->src1);
rhs = get_ioperand(fn, insn->type, insn->src2);
pseudo_name(insn->target, target_name);
switch (insn->opcode) {
/* Binary */
case OP_ADD:
target = LLVMBuildAdd(fn->builder, lhs, rhs, target_name);
break;
case OP_SUB:
target = LLVMBuildSub(fn->builder, lhs, rhs, target_name);
break;
case OP_MUL:
target = LLVMBuildMul(fn->builder, lhs, rhs, target_name);
break;
case OP_DIVU:
target = LLVMBuildUDiv(fn->builder, lhs, rhs, target_name);
break;
case OP_DIVS:
assert(!is_float_type(insn->type));
target = LLVMBuildSDiv(fn->builder, lhs, rhs, target_name);
break;
case OP_MODU:
assert(!is_float_type(insn->type));
target = LLVMBuildURem(fn->builder, lhs, rhs, target_name);
break;
case OP_MODS:
assert(!is_float_type(insn->type));
target = LLVMBuildSRem(fn->builder, lhs, rhs, target_name);
break;
case OP_SHL:
assert(!is_float_type(insn->type));
target = LLVMBuildShl(fn->builder, lhs, rhs, target_name);
break;
case OP_LSR:
assert(!is_float_type(insn->type));
target = LLVMBuildLShr(fn->builder, lhs, rhs, target_name);
break;
case OP_ASR:
assert(!is_float_type(insn->type));
target = LLVMBuildAShr(fn->builder, lhs, rhs, target_name);
break;
/* floating-point */
case OP_FADD:
target = LLVMBuildFAdd(fn->builder, lhs, rhs, target_name);
break;
case OP_FSUB:
target = LLVMBuildFSub(fn->builder, lhs, rhs, target_name);
break;
case OP_FMUL:
target = LLVMBuildFMul(fn->builder, lhs, rhs, target_name);
break;
case OP_FDIV:
target = LLVMBuildFDiv(fn->builder, lhs, rhs, target_name);
break;
/* Logical */
case OP_AND:
assert(!is_float_type(insn->type));
target = LLVMBuildAnd(fn->builder, lhs, rhs, target_name);
break;
case OP_OR:
assert(!is_float_type(insn->type));
target = LLVMBuildOr(fn->builder, lhs, rhs, target_name);
break;
case OP_XOR:
assert(!is_float_type(insn->type));
target = LLVMBuildXor(fn->builder, lhs, rhs, target_name);
break;
default:
assert(0);
break;
}
target = adjust_type(fn, insn->type, target);
insn->target->priv = target;
}
static void output_op_compare(struct function *fn, struct instruction *insn)
{
LLVMValueRef lhs, rhs, target;
char target_name[64];
lhs = pseudo_to_value(fn, NULL, insn->src1);
if (insn->src2->type == PSEUDO_VAL)
rhs = constant_value(insn->src2->value, LLVMTypeOf(lhs));
else
rhs = pseudo_to_value(fn, NULL, insn->src2);
if (!rhs)
rhs = LLVMGetUndef(symbol_type(insn->type));
pseudo_name(insn->target, target_name);
LLVMTypeRef dst_type = insn_symbol_type(insn);
switch (LLVMGetTypeKind(LLVMTypeOf(lhs))) {
case LLVMPointerTypeKind:
lhs = value_to_pvalue(fn, &ptr_ctype, lhs);
rhs = value_to_pvalue(fn, &ptr_ctype, rhs);
/* fall through */
case LLVMIntegerTypeKind: {
LLVMIntPredicate op = translate_op(insn->opcode);
if (LLVMGetTypeKind(LLVMTypeOf(rhs)) == LLVMPointerTypeKind) {
LLVMTypeRef ltype = LLVMTypeOf(lhs);
rhs = LLVMBuildPtrToInt(fn->builder, rhs, ltype, "");
}
target = LLVMBuildICmp(fn->builder, op, lhs, rhs, target_name);
break;
}
case LLVMHalfTypeKind:
case LLVMFloatTypeKind:
case LLVMDoubleTypeKind:
case LLVMX86_FP80TypeKind:
case LLVMFP128TypeKind:
case LLVMPPC_FP128TypeKind: {
LLVMRealPredicate op = translate_fop(insn->opcode);
target = LLVMBuildFCmp(fn->builder, op, lhs, rhs, target_name);
break;
}
default:
assert(0);
}
target = LLVMBuildZExt(fn->builder, target, dst_type, target_name);
insn->target->priv = target;
}
static void output_op_ret(struct function *fn, struct instruction *insn)
{
pseudo_t pseudo = insn->src;
if (pseudo && pseudo != VOID) {
LLVMValueRef result = get_operand(fn, insn->type, pseudo);
LLVMBuildRet(fn->builder, result);
} else
LLVMBuildRetVoid(fn->builder);
}
static LLVMValueRef calc_memop_addr(struct function *fn, struct instruction *insn)
{
LLVMTypeRef int_type, addr_type;
LLVMValueRef src, off, addr;
unsigned int as;
/* int type large enough to hold a pointer */
int_type = LLVMIntType(bits_in_pointer);
off = LLVMConstInt(int_type, insn->offset, 0);
/* convert src to the effective pointer type */
src = pseudo_to_value(fn, insn->type, insn->src);
as = LLVMGetPointerAddressSpace(LLVMTypeOf(src));
addr_type = LLVMPointerType(insn_symbol_type(insn), as);
src = LLVMBuildPointerCast(fn->builder, src, addr_type, LLVMGetValueName(src));
/* addr = src + off */
addr = calc_gep(fn->builder, src, off);
return addr;
}
static void output_op_load(struct function *fn, struct instruction *insn)
{
LLVMValueRef addr, target;
char name[MAX_PSEUDO_NAME];
addr = calc_memop_addr(fn, insn);
/* perform load */
pseudo_name(insn->target, name);
#if LLVM_VERSION_MAJOR > 14
target = LLVMBuildLoad2(fn->builder, symbol_type(insn->type), addr, name);
#else
target = LLVMBuildLoad(fn->builder, addr, name);
#endif
insn->target->priv = target;
}
static void output_op_store(struct function *fn, struct instruction *insn)
{
LLVMValueRef addr, target_in;
addr = calc_memop_addr(fn, insn);
target_in = pseudo_to_rvalue(fn, insn->type, insn->target);
/* perform store */
LLVMBuildStore(fn->builder, target_in, addr);
}
static LLVMValueRef bool_value(struct function *fn, LLVMValueRef value)
{
if (LLVMTypeOf(value) != LLVMInt1Type())
value = LLVMBuildIsNotNull(fn->builder, value, LLVMGetValueName(value));
return value;
}
static void output_op_cbr(struct function *fn, struct instruction *br)
{
LLVMValueRef cond = bool_value(fn,
pseudo_to_value(fn, NULL, br->cond));
LLVMBuildCondBr(fn->builder, cond,
br->bb_true->priv,
br->bb_false->priv);
}
static void output_op_br(struct function *fn, struct instruction *br)
{
LLVMBuildBr(fn->builder, br->bb_true->priv);
}
static void output_op_sel(struct function *fn, struct instruction *insn)
{
LLVMValueRef target, src1, src2, src3;
char name[MAX_PSEUDO_NAME];
src1 = bool_value(fn, pseudo_to_value(fn, NULL, insn->src1));
src2 = get_operand(fn, insn->type, insn->src2);
src3 = get_operand(fn, insn->type, insn->src3);
pseudo_name(insn->target, name);
target = LLVMBuildSelect(fn->builder, src1, src2, src3, name);
insn->target->priv = adjust_type(fn, insn->type, target);
}
static void output_op_switch(struct function *fn, struct instruction *insn)
{
LLVMValueRef sw_val, target;
struct basic_block *def = NULL;
struct multijmp *jmp;
int n_jmp = 0;
FOR_EACH_PTR(insn->multijmp_list, jmp) {
if (jmp->begin <= jmp->end) {
n_jmp += (jmp->end - jmp->begin) + 1;
} else /* default case */
def = jmp->target;
} END_FOR_EACH_PTR(jmp);
sw_val = get_ioperand(fn, insn->type, insn->cond);
target = LLVMBuildSwitch(fn->builder, sw_val,
def ? def->priv : NULL, n_jmp);
FOR_EACH_PTR(insn->multijmp_list, jmp) {
long long val;
for (val = jmp->begin; val <= jmp->end; val++) {
LLVMValueRef Val = val_to_value(val, insn->type);
LLVMAddCase(target, Val, jmp->target->priv);
}
} END_FOR_EACH_PTR(jmp);
}
static void output_op_call(struct function *fn, struct instruction *insn)
{
LLVMValueRef target, func;
struct symbol *fntype;
struct symbol *ctype;
int n_arg = 0, i;
struct pseudo *arg;
LLVMValueRef *args;
char name[64];
n_arg = pseudo_list_size(insn->arguments);
args = calloc(n_arg, sizeof(LLVMValueRef));
PREPARE_PTR_LIST(insn->fntypes, ctype);
if (insn->func->type == PSEUDO_REG || insn->func->type == PSEUDO_PHI)
func = get_operand(fn, ctype, insn->func);
else
func = pseudo_to_value(fn, ctype, insn->func);
i = 0;
fntype = ctype; // first symbol in the list is the function 'true' type
FOR_EACH_PTR(insn->arguments, arg) {
NEXT_PTR_LIST(ctype); // the remaining ones are the arguments' type
args[i++] = pseudo_to_rvalue(fn, ctype, arg);
} END_FOR_EACH_PTR(arg);
FINISH_PTR_LIST(ctype);
pseudo_name(insn->target, name);
#if LLVM_VERSION_MAJOR > 14
target = LLVMBuildCall2(fn->builder, func_full_type(fntype), func, args, n_arg, name);
#else
(void) fntype;
target = LLVMBuildCall(fn->builder, func, args, n_arg, name);
#endif
insn->target->priv = target;
}
static void output_op_phisrc(struct function *fn, struct instruction *insn)
{
insn->src->priv = get_operand(fn, insn->type, insn->src);
}
static void output_op_phi(struct function *fn, struct instruction *insn)
{
LLVMTypeRef dst_type = insn_symbol_type(insn);
insn->target->priv = LLVMBuildPhi(fn->builder, dst_type, "");
}
static void output_op_ptrcast(struct function *fn, struct instruction *insn)
{
LLVMValueRef src, target;
LLVMTypeRef dtype;
struct symbol *otype = insn->orig_type;
LLVMOpcode op;
char target_name[64];
src = get_operand(fn, otype, insn->src);
pseudo_name(insn->target, target_name);
dtype = symbol_type(insn->type);
switch (insn->opcode) {
case OP_UTPTR:
case OP_SEXT: // FIXME
assert(is_int_type(otype));
assert(is_ptr_type(insn->type));
op = LLVMIntToPtr;
break;
case OP_PTRTU:
assert(is_ptr_type(otype));
assert(is_int_type(insn->type));
op = LLVMPtrToInt;
break;
case OP_PTRCAST:
case OP_ZEXT: // FIXME
assert(is_ptr_type(otype));
assert(is_ptr_type(insn->type));
op = LLVMBitCast;
break;
default:
assert(0);
}
target = LLVMBuildCast(fn->builder, op, src, dtype, target_name);
insn->target->priv = target;
}
static void output_op_cast(struct function *fn, struct instruction *insn, LLVMOpcode op)
{
LLVMValueRef src, target;
LLVMTypeRef dtype;
struct symbol *otype = insn->orig_type;
char target_name[64];
if (is_ptr_type(insn->type)) // cast to void* is OP_CAST ...
return output_op_ptrcast(fn, insn);
assert(is_int_type(insn->type));
src = get_operand(fn, otype, insn->src);
pseudo_name(insn->target, target_name);
dtype = symbol_type(insn->type);
if (is_ptr_type(otype)) {
op = LLVMPtrToInt;
} else if (is_float_type(otype)) {
assert(op == LLVMFPToUI || op == LLVMFPToSI);
} else if (is_int_type(otype)) {
unsigned int width = otype->bit_size;
if (insn->size < width)
op = LLVMTrunc;
else if (insn->size == width)
op = LLVMBitCast;
} else {
assert(0);
}
target = LLVMBuildCast(fn->builder, op, src, dtype, target_name);
insn->target->priv = target;
}
static void output_op_fpcast(struct function *fn, struct instruction *insn)
{
LLVMTypeRef dtype = symbol_type(insn->type);
LLVMValueRef src, target;
struct symbol *otype = insn->orig_type;
char name[64];
assert(is_float_type(insn->type));
pseudo_name(insn->target, name);
src = get_operand(fn, otype, insn->src);
switch (insn->opcode) {
case OP_FCVTF:
target = LLVMBuildFPCast(fn->builder, src, dtype, name);
break;
case OP_SCVTF:
target = LLVMBuildSIToFP(fn->builder, src, dtype, name);
break;
case OP_UCVTF:
target = LLVMBuildUIToFP(fn->builder, src, dtype, name);
break;
default:
assert(0);
}
insn->target->priv = target;
}
static void output_op_label(struct function *fn, struct instruction *insn)
{
insn->target->priv = LLVMBlockAddress(fn->fn, insn->bb_true->priv);
}
static void output_op_setval(struct function *fn, struct instruction *insn)
{
struct expression *val = insn->val;
LLVMValueRef target;
switch (val->type) {
case EXPR_LABEL:
target = LLVMBlockAddress(fn->fn, val->symbol->bb_target->priv);
break;
default:
assert(0);
}
insn->target->priv = target;
}
static void output_op_setfval(struct function *fn, struct instruction *insn)
{
LLVMTypeRef dtype = symbol_type(insn->type);
LLVMValueRef target;
target = LLVMConstReal(dtype, insn->fvalue);