PIC16 emits auto variables as globals. When optimizer removes a function entierly by estimating its side effects on globals, those globals(autos) without a function were not being printed by the Asm printer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73135 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PIC16/PIC16AsmPrinter.cpp b/lib/Target/PIC16/PIC16AsmPrinter.cpp
index b42ee45..58795a1 100644
--- a/lib/Target/PIC16/PIC16AsmPrinter.cpp
+++ b/lib/Target/PIC16/PIC16AsmPrinter.cpp
@@ -280,6 +280,7 @@
bool PIC16AsmPrinter::doFinalization(Module &M) {
printLibcallDecls();
+ EmitRemainingAutos();
DbgInfo.EmitVarDebugInfo(M);
DbgInfo.EmitEOF();
O << "\n\t" << "END\n";
@@ -383,6 +384,8 @@
for (unsigned i = 0; i < AutosSections.size(); i++) {
O << "\n";
if (AutosSections[i]->S_->getName() == SectionName) {
+ // Set the printing status to true
+ AutosSections[i]->setPrintedStatus(true);
SwitchToSection(AutosSections[i]->S_);
std::vector<const GlobalVariable*> Items = AutosSections[i]->Items;
for (unsigned j = 0; j < Items.size(); j++) {
@@ -398,3 +401,34 @@
}
}
+// Print autos that were not printed during the code printing of functions.
+// As the functions might themselves would have got deleted by the optimizer.
+void PIC16AsmPrinter::EmitRemainingAutos()
+{
+ const TargetData *TD = TM.getTargetData();
+
+ // Now print Autos section for this function.
+ std::vector <PIC16Section *>AutosSections = PTAI->AutosSections;
+ for (unsigned i = 0; i < AutosSections.size(); i++) {
+
+ // if the section is already printed then don't print again
+ if (AutosSections[i]->isPrinted())
+ continue;
+
+ // Set status as printed
+ AutosSections[i]->setPrintedStatus(true);
+
+ O << "\n";
+ SwitchToSection(AutosSections[i]->S_);
+ std::vector<const GlobalVariable*> Items = AutosSections[i]->Items;
+ for (unsigned j = 0; j < Items.size(); j++) {
+ std::string VarName = Mang->getValueName(Items[j]);
+ Constant *C = Items[j]->getInitializer();
+ const Type *Ty = C->getType();
+ unsigned Size = TD->getTypeAllocSize(Ty);
+ // Emit memory reserve directive.
+ O << VarName << " RES " << Size << "\n";
+ }
+ }
+}
+
diff --git a/lib/Target/PIC16/PIC16AsmPrinter.h b/lib/Target/PIC16/PIC16AsmPrinter.h
index 2545dfd..8bdcf72 100644
--- a/lib/Target/PIC16/PIC16AsmPrinter.h
+++ b/lib/Target/PIC16/PIC16AsmPrinter.h
@@ -52,6 +52,7 @@
void EmitIData (Module &M);
void EmitUData (Module &M);
void EmitAutos (std::string FunctName);
+ void EmitRemainingAutos ();
void EmitRomData (Module &M);
void EmitFunctionFrame(MachineFunction &MF);
void printLibcallDecls(void);
diff --git a/lib/Target/PIC16/PIC16TargetAsmInfo.h b/lib/Target/PIC16/PIC16TargetAsmInfo.h
index e464e36..b7292b8 100644
--- a/lib/Target/PIC16/PIC16TargetAsmInfo.h
+++ b/lib/Target/PIC16/PIC16TargetAsmInfo.h
@@ -33,9 +33,13 @@
struct PIC16Section {
const Section *S_; // Connection to actual Section.
unsigned Size; // Total size of the objects contained.
+ bool SectionPrinted;
std::vector<const GlobalVariable*> Items;
- PIC16Section (const Section *s) { S_ = s; Size = 0; }
+ PIC16Section (const Section *s) { S_ = s; Size = 0;
+ SectionPrinted = false;}
+ bool isPrinted() { return SectionPrinted ; }
+ void setPrintedStatus(bool status) { SectionPrinted = status ;}
};
struct PIC16TargetAsmInfo : public TargetAsmInfo {