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-rw-r--r--lldb/source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptx86ABIFixups.cpp68
1 files changed, 28 insertions, 40 deletions
diff --git a/lldb/source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptx86ABIFixups.cpp b/lldb/source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptx86ABIFixups.cpp
index 439d372fade..1e75126621c 100644
--- a/lldb/source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptx86ABIFixups.cpp
+++ b/lldb/source/Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptx86ABIFixups.cpp
@@ -46,18 +46,15 @@ bool isRSAPICall(llvm::Module &module, llvm::CallInst *call_inst) {
bool isRSLargeReturnCall(llvm::Module &module, llvm::CallInst *call_inst) {
// i686 and x86_64 returns for large vectors in the RenderScript API are not
- // handled as normal
- // register pairs, but as a hidden sret type. This is not reflected in the
- // debug info or mangled
- // symbol name, and the android ABI for x86 and x86_64, (as well as the
- // emulators) specifies there is
- // no AVX, so bcc generates an sret function because we cannot natively return
+ // handled as normal register pairs, but as a hidden sret type. This is not
+ // reflected in the debug info or mangled symbol name, and the android ABI
+ // for x86 and x86_64, (as well as the emulators) specifies there is no AVX,
+ // so bcc generates an sret function because we cannot natively return
// 256 bit vectors.
// This function simply checks whether a function has a > 128bit return type.
- // It is perhaps an
- // unreliable heuristic, and relies on bcc not generating AVX code, so if the
- // android ABI one day
- // provides for AVX, this function may go out of fashion.
+ // It is perhaps an unreliable heuristic, and relies on bcc not generating
+ // AVX code, so if the android ABI one day provides for AVX, this function
+ // may go out of fashion.
(void)module;
if (!call_inst || !call_inst->getCalledFunction())
return false;
@@ -88,12 +85,11 @@ bool isRSAllocationTyCallSite(llvm::Module &module, llvm::CallInst *call_inst) {
llvm::FunctionType *cloneToStructRetFnTy(llvm::CallInst *call_inst) {
// on x86 StructReturn functions return a pointer to the return value, rather
- // than the return
- // value itself [ref](http://www.agner.org/optimize/calling_conventions.pdf
- // section 6).
- // We create a return type by getting the pointer type of the old return type,
- // and inserting a new
- // initial argument of pointer type of the original return type.
+ // than the return value itself
+ // [ref](http://www.agner.org/optimize/calling_conventions.pdf section 6). We
+ // create a return type by getting the pointer type of the old return type,
+ // and inserting a new initial argument of pointer type of the original
+ // return type.
Log *log(
GetLogIfAnyCategoriesSet(LIBLLDB_LOG_LANGUAGE | LIBLLDB_LOG_EXPRESSIONS));
@@ -112,8 +108,7 @@ llvm::FunctionType *cloneToStructRetFnTy(llvm::CallInst *call_inst) {
orig_type->param_end()};
// This may not work if the function is somehow declared void as llvm is
- // strongly typed
- // and represents void* with i8*
+ // strongly typed and represents void* with i8*
assert(!orig_type->getReturnType()->isVoidTy() &&
"Cannot add StructRet attribute to void function");
llvm::PointerType *return_type_ptr_type =
@@ -126,8 +121,8 @@ llvm::FunctionType *cloneToStructRetFnTy(llvm::CallInst *call_inst) {
if (log)
log->Printf("%s - return type pointer type for StructRet clone @ '0x%p':\n",
__FUNCTION__, (void *)return_type_ptr_type);
- // put the the sret pointer argument in place at the beginning of the argument
- // list.
+ // put the the sret pointer argument in place at the beginning of the
+ // argument list.
params.emplace(params.begin(), return_type_ptr_type);
assert(params.size() == num_params + 1);
return llvm::FunctionType::get(return_type_ptr_type, params,
@@ -157,11 +152,9 @@ bool findRSCallSites(llvm::Module &module,
bool fixupX86StructRetCalls(llvm::Module &module) {
bool changed = false;
- // changing a basic block while iterating over it seems to have some undefined
- // behaviour
- // going on so we find all RS callsites first, then fix them up after
- // consuming
- // the iterator.
+ // changing a basic block while iterating over it seems to have some
+ // undefined behaviour going on so we find all RS callsites first, then fix
+ // them up after consuming the iterator.
std::set<llvm::CallInst *> rs_callsites;
if (!findRSCallSites(module, rs_callsites, isRSLargeReturnCall))
return false;
@@ -180,8 +173,7 @@ bool fixupX86StructRetCalls(llvm::Module &module) {
// Allocate enough space to store the return value of the original function
// we pass a pointer to this allocation as the StructRet param, and then
- // copy its
- // value into the lldb return value
+ // copy its value into the lldb return value
const llvm::DataLayout &DL = module.getDataLayout();
llvm::AllocaInst *return_value_alloc = new llvm::AllocaInst(
func->getReturnType(), DL.getAllocaAddrSpace(), "var_vector_return_alloc",
@@ -222,19 +214,15 @@ bool fixupX86StructRetCalls(llvm::Module &module) {
bool fixupRSAllocationStructByValCalls(llvm::Module &module) {
// On x86_64, calls to functions in the RS runtime that take an
- // `rs_allocation` type argument
- // are actually handled as by-ref params by bcc, but appear to be passed by
- // value by lldb (the callsite all use
- // `struct byval`).
- // On x86_64 Linux, struct arguments are transferred in registers if the
- // struct size is no bigger than
- // 128bits [ref](http://www.agner.org/optimize/calling_conventions.pdf)
- // section 7.1 "Passing and returning objects"
- // otherwise passed on the stack.
- // an object of type `rs_allocation` is actually 256bits, so should be passed
- // on the stack. However, code generated
- // by bcc actually treats formal params of type `rs_allocation` as
- // `rs_allocation *` so we need to convert the
+ // `rs_allocation` type argument are actually handled as by-ref params by
+ // bcc, but appear to be passed by value by lldb (the callsite all use
+ // `struct byval`). On x86_64 Linux, struct arguments are transferred in
+ // registers if the struct size is no bigger than 128bits
+ // [ref](http://www.agner.org/optimize/calling_conventions.pdf) section 7.1
+ // "Passing and returning objects" otherwise passed on the stack. an object
+ // of type `rs_allocation` is actually 256bits, so should be passed on the
+ // stack. However, code generated by bcc actually treats formal params of
+ // type `rs_allocation` as `rs_allocation *` so we need to convert the
// calling convention to pass by reference, and remove any hint of byval from
// formal parameters.
bool changed = false;
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