Remove FreeInst.
Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.
llvm-svn: 85176
diff --git a/llvm/lib/VMCore/Instruction.cpp b/llvm/lib/VMCore/Instruction.cpp
index 3839dda..391ba7b 100644
--- a/llvm/lib/VMCore/Instruction.cpp
+++ b/llvm/lib/VMCore/Instruction.cpp
@@ -127,7 +127,6 @@
case Xor: return "xor";
// Memory instructions...
- case Free: return "free";
case Alloca: return "alloca";
case Load: return "load";
case Store: return "store";
@@ -303,16 +302,43 @@
return false;
}
+// Code here matches isFreeCall from MallocHelper, which is not in VMCore.
+static bool isFreeCall(const Value* I) {
+ const CallInst *CI = dyn_cast<CallInst>(I);
+ if (!CI)
+ return false;
+
+ const Module* M = CI->getParent()->getParent()->getParent();
+ Function *FreeFunc = M->getFunction("free");
+
+ if (CI->getOperand(0) != FreeFunc)
+ return false;
+
+ // Check free prototype.
+ // FIXME: workaround for PR5130, this will be obsolete when a nobuiltin
+ // attribute will exist.
+ const FunctionType *FTy = FreeFunc->getFunctionType();
+ if (FTy->getReturnType() != Type::getVoidTy(M->getContext()))
+ return false;
+ if (FTy->getNumParams() != 1)
+ return false;
+ if (FTy->param_begin()->get() != Type::getInt8PtrTy(M->getContext()))
+ return false;
+
+ return true;
+}
+
/// mayReadFromMemory - Return true if this instruction may read memory.
///
bool Instruction::mayReadFromMemory() const {
switch (getOpcode()) {
default: return false;
- case Instruction::Free:
case Instruction::VAArg:
case Instruction::Load:
return true;
case Instruction::Call:
+ if (isFreeCall(this))
+ return true;
return !cast<CallInst>(this)->doesNotAccessMemory();
case Instruction::Invoke:
return !cast<InvokeInst>(this)->doesNotAccessMemory();
@@ -326,11 +352,12 @@
bool Instruction::mayWriteToMemory() const {
switch (getOpcode()) {
default: return false;
- case Instruction::Free:
case Instruction::Store:
case Instruction::VAArg:
return true;
case Instruction::Call:
+ if (isFreeCall(this))
+ return true;
return !cast<CallInst>(this)->onlyReadsMemory();
case Instruction::Invoke:
return !cast<InvokeInst>(this)->onlyReadsMemory();
@@ -398,7 +425,19 @@
if (CI->getOperand(0) != MallocFunc)
return false;
- return true;
+ // Check malloc prototype.
+ // FIXME: workaround for PR5130, this will be obsolete when a nobuiltin
+ // attribute will exist.
+ const FunctionType *FTy = cast<Function>(MallocFunc)->getFunctionType();
+ if (FTy->getNumParams() != 1)
+ return false;
+ if (IntegerType *ITy = dyn_cast<IntegerType>(FTy->param_begin()->get())) {
+ if (ITy->getBitWidth() != 32 && ITy->getBitWidth() != 64)
+ return false;
+ return true;
+ }
+
+ return false;
}
bool Instruction::isSafeToSpeculativelyExecute() const {
@@ -444,7 +483,6 @@
case Invoke:
case PHI:
case Store:
- case Free:
case Ret:
case Br:
case Switch: