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Stop using alloca.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82225 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2009-09-18 16:46:16 +00:00
parent e2394e9bfe
commit 7de3bd273e
1 changed files with 14 additions and 17 deletions
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31
lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
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@ -33,10 +33,6 @@
#include <map> #include <map>
#include <cmath> #include <cmath>
#include <cstring> #include <cstring>
// Some platforms may need malloc.h for alloca.
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_FFI_CALL #ifdef HAVE_FFI_CALL
#ifdef HAVE_FFI_H #ifdef HAVE_FFI_H
@ -207,9 +203,10 @@ static bool ffiInvoke(RawFunc Fn, Function *F,
ArgBytes += TD->getTypeStoreSize(ArgTy); ArgBytes += TD->getTypeStoreSize(ArgTy);
} }
uint8_t *ArgData = (uint8_t*) alloca(ArgBytes); SmallVector<uint8_t, 128> ArgData;
uint8_t *ArgDataPtr = ArgData; ArgData.resize(ArgBytes);
std::vector<void*> values(NumArgs); uint8_t *ArgDataPtr = ArgData.data();
SmallVector<void*, 16> values(NumArgs);
for (Function::const_arg_iterator A = F->arg_begin(), E = F->arg_end(); for (Function::const_arg_iterator A = F->arg_begin(), E = F->arg_end();
A != E; ++A) { A != E; ++A) {
const unsigned ArgNo = A->getArgNo(); const unsigned ArgNo = A->getArgNo();
@ -222,22 +219,22 @@ static bool ffiInvoke(RawFunc Fn, Function *F,
ffi_type *rtype = ffiTypeFor(RetTy); ffi_type *rtype = ffiTypeFor(RetTy);
if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI, NumArgs, rtype, &args[0]) == FFI_OK) { if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI, NumArgs, rtype, &args[0]) == FFI_OK) {
void *ret = NULL; SmallVector<uint8_t, 128> ret;
if (RetTy->getTypeID() != Type::VoidTyID) if (RetTy->getTypeID() != Type::VoidTyID)
ret = alloca(TD->getTypeStoreSize(RetTy)); ret.resize(TD->getTypeStoreSize(RetTy));
ffi_call(&cif, Fn, ret, &values[0]); ffi_call(&cif, Fn, ret.data(), values.data());
switch (RetTy->getTypeID()) { switch (RetTy->getTypeID()) {
case Type::IntegerTyID: case Type::IntegerTyID:
switch (cast<IntegerType>(RetTy)->getBitWidth()) { switch (cast<IntegerType>(RetTy)->getBitWidth()) {
case 8: Result.IntVal = APInt(8 , *(int8_t *) ret); break; case 8: Result.IntVal = APInt(8 , *(int8_t *) ret.data()); break;
case 16: Result.IntVal = APInt(16, *(int16_t*) ret); break; case 16: Result.IntVal = APInt(16, *(int16_t*) ret.data()); break;
case 32: Result.IntVal = APInt(32, *(int32_t*) ret); break; case 32: Result.IntVal = APInt(32, *(int32_t*) ret.data()); break;
case 64: Result.IntVal = APInt(64, *(int64_t*) ret); break; case 64: Result.IntVal = APInt(64, *(int64_t*) ret.data()); break;
} }
break; break;
case Type::FloatTyID: Result.FloatVal = *(float *) ret; break; case Type::FloatTyID: Result.FloatVal = *(float *) ret.data(); break;
case Type::DoubleTyID: Result.DoubleVal = *(double*) ret; break; case Type::DoubleTyID: Result.DoubleVal = *(double*) ret.data(); break;
case Type::PointerTyID: Result.PointerVal = *(void **) ret; break; case Type::PointerTyID: Result.PointerVal = *(void **) ret.data(); break;
default: break; default: break;
} }
return true; return true;