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De-virtualize SwitchSection.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28047 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeff Cohen 2006-05-02 03:58:45 +00:00
parent c6a057b04d
commit 51b776d259
4 changed files with 46 additions and 40 deletions
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5
include/llvm/CodeGen/AsmPrinter.h
View File

@ -26,12 +26,10 @@ namespace llvm {
class GlobalVariable;
class AsmPrinter : public MachineFunctionPass {
protected:
/// CurrentSection - The current section we are emitting to. This is
/// controlled and used by the SwitchSection method.
std::string CurrentSection;
private:
/// FunctionNumber - This provides a unique ID for each function emitted in
/// this translation unit. It is autoincremented by SetupMachineFunction,
/// and can be accessed with getFunctionNumber() and
@ -139,6 +137,7 @@ namespace llvm {
/// emit a global to an arbitrary section. The section name is emited after
/// this.
const char *SwitchToSectionDirective; // Defaults to "\t.section\t"
bool MLSections; // True if Microsoft ML assembler is targetted
/// ConstantPoolSection - This is the section that we SwitchToSection right
/// before emitting the constant pool for a function.
@ -188,7 +187,7 @@ namespace llvm {
/// If the new section is an empty string, this method forgets what the
/// current section is, but does not emit a .section directive.
///
virtual void SwitchSection(const char *NewSection, const GlobalValue *GV);
void SwitchSection(const char *NewSection, const GlobalValue *GV);
/// getPreferredAlignmentLog - Return the preferred alignment of the
/// specified global, returned in log form. This includes an explicitly

52
lib/CodeGen/AsmPrinter.cpp
View File

@ -47,6 +47,7 @@ AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm)
AlignDirective("\t.align\t"),
AlignmentIsInBytes(true),
SwitchToSectionDirective("\t.section\t"),
MLSections(false),
ConstantPoolSection("\t.section .rodata\n"),
JumpTableSection("\t.section .rodata\n"),
StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
@ -63,16 +64,47 @@ AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm)
///
void AsmPrinter::SwitchSection(const char *NewSection, const GlobalValue *GV) {
std::string NS;
if (GV && GV->hasSection())
NS = SwitchToSectionDirective + GV->getSection();
else
NS = std::string("\t")+NewSection;
if (CurrentSection != NS) {
CurrentSection = NS;
if (!CurrentSection.empty())
O << CurrentSection << '\n';
// Microsoft ML/MASM has a fundamentally different approach to handling
// sections.
if (MLSections) {
if (*NewSection == 0) {
// Simply end the current section, if any.
if (CurrentSection != "") {
O << CurrentSection << "\tends\n";
CurrentSection = "";
}
return;
}
bool isData = strcmp(NewSection , ".data") == 0;
if (GV && GV->hasSection())
NS = GV->getSection();
else if (isData)
NS = "_data";
else
NS = "_text";
if (CurrentSection != NS) {
if (CurrentSection != "")
O << CurrentSection << "\tends\n";
CurrentSection = NS;
O << CurrentSection << (isData ? "\tsegment 'DATA'\n"
: "\tsegment 'CODE'\n");
}
} else {
if (GV && GV->hasSection())
NS = SwitchToSectionDirective + GV->getSection();
else
NS = std::string("\t")+NewSection;
if (CurrentSection != NS) {
CurrentSection = NS;
if (!CurrentSection.empty())
O << CurrentSection << '\n';
}
}
}

28
lib/Target/X86/X86IntelAsmPrinter.cpp
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@ -28,6 +28,7 @@ X86IntelAsmPrinter::X86IntelAsmPrinter(std::ostream &O, X86TargetMachine &TM)
GlobalPrefix = "_";
PrivateGlobalPrefix = "$";
AlignDirective = "\talign\t";
MLSections = true;
ZeroDirective = "\tdb\t";
ZeroDirectiveSuffix = " dup(0)";
AsciiDirective = "\tdb\t";
@ -443,36 +444,11 @@ bool X86IntelAsmPrinter::doInitialization(Module &M) {
bool X86IntelAsmPrinter::doFinalization(Module &M) {
X86SharedAsmPrinter::doFinalization(M);
if (CurrentSection != "")
O << CurrentSection << "\tends\n";
SwitchSection("", 0);
O << "\tend\n";
return false;
}
void X86IntelAsmPrinter::SwitchSection(const char *NewSection,
const GlobalValue *GV) {
if (*NewSection == 0)
return;
std::string NS;
bool isData = strcmp(NewSection , ".data") == 0;
if (GV && GV->hasSection())
NS = GV->getSection();
else if (isData)
NS = "_data";
else
NS = "_text";
if (CurrentSection != NS) {
if (CurrentSection != "")
O << CurrentSection << "\tends\n";
CurrentSection = NS;
O << CurrentSection << (isData ? "\tsegment 'DATA'\n"
: "\tsegment 'CODE'\n");
}
}
void X86IntelAsmPrinter::EmitString(const ConstantArray *CVA) const {
unsigned NumElts = CVA->getNumOperands();
if (NumElts) {

1
lib/Target/X86/X86IntelAsmPrinter.h
View File

@ -92,7 +92,6 @@ struct X86IntelAsmPrinter : public X86SharedAsmPrinter {
bool doInitialization(Module &M);
bool doFinalization(Module &M);
virtual void SwitchSection(const char *NewSection, const GlobalValue *GV);
virtual void EmitString(const ConstantArray *CVA) const;
};