6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-12 13:38:21 +00:00
Code Issues Projects Releases Wiki Activity

Revert "Transforms: reapply SVN r219899"

Browse Source 
This reverts commit r220811 and r220839. It made an incorrect change to
musttail handling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221226 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2014-11-04 02:02:14 +00:00
parent f4b76be936
commit 9d18e626cc
7 changed files with 49 additions and 110 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
lib/Transforms/Utils/InlineFunction.cpp
View File

@ -743,8 +743,7 @@ static void HandleByValArgumentInit(Value *Dst, Value *Src, Module *M,
static Value *HandleByValArgument(Value *Arg, Instruction *TheCall,
const Function *CalledFunc,
InlineFunctionInfo &IFI,
unsigned ByValAlignment,
bool &AddedNewAllocas) {
unsigned ByValAlignment) {
PointerType *ArgTy = cast<PointerType>(Arg->getType());
Type *AggTy = ArgTy->getElementType();
@ -786,7 +785,6 @@ static Value *HandleByValArgument(Value *Arg, Instruction *TheCall,
// Uses of the argument in the function should use our new alloca
// instead.
AddedNewAllocas = true;
return NewAlloca;
}
@ -960,7 +958,6 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI,
SmallVector<ReturnInst*, 8> Returns;
ClonedCodeInfo InlinedFunctionInfo;
Function::iterator FirstNewBlock;
bool AddedNewAllocas = false;
{ // Scope to destroy VMap after cloning.
ValueToValueMapTy VMap;
@ -984,8 +981,7 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI,
// modify the struct.
if (CS.isByValArgument(ArgNo)) {
ActualArg = HandleByValArgument(ActualArg, TheCall, CalledFunc, IFI,
CalledFunc->getParamAlignment(ArgNo+1),
AddedNewAllocas);
CalledFunc->getParamAlignment(ArgNo+1));
if (ActualArg != *AI)
ByValInit.push_back(std::make_pair(ActualArg, (Value*) *AI));
}
@ -1100,18 +1096,9 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI,
// f -> musttail g -> tail f ==> f -> tail f
// f -> g -> musttail f ==> f -> f
// f -> g -> tail f ==> f -> f
//
// If an alloca was introduced in the frame due to a byval parameter
// being passed to a subsequent call, tail calls must have the tail
// stripped as they may not access variables in the caller's stack.
// A single alloca ripples through out as the alloca may be aliased by
// bitcasts or may escape and be mutated outside of the function.
CallInst::TailCallKind ChildTCK = CI->getTailCallKind();
ChildTCK = std::min(CallSiteTailKind, ChildTCK);
if (AddedNewAllocas)
CI->setTailCallKind(CallInst::TCK_None);
else
CI->setTailCallKind(ChildTCK);
CI->setTailCallKind(ChildTCK);
InlinedMustTailCalls |= CI->isMustTailCall();
// Calls inlined through a 'nounwind' call site should be marked