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add support for prefix/suffix strings to go around GlobalValue(s)

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(which may or be function pointers) in the asmprinter. For the moment,
this changes nothing, except the IA64 backend which can use this to write:

  data8.ua  @fptr(blah__blah__mangled_function_name)

  (by setting FunctionAddrPrefix/Suffix to "@fptr(" / ")")


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21024 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duraid Madina 2005-04-02 12:21:51 +00:00
parent 75c9fcbdcc
commit 855a519741
2 changed files with 29 additions and 5 deletions
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19
include/llvm/CodeGen/AsmPrinter.h
View File

@ -54,6 +54,21 @@ namespace llvm {
/// onto all global symbols. This is often used for "_" or ".".
const char *GlobalPrefix; // Defaults to ""
/// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
/// will enclose any GlobalVariable (that isn't a function)
///
const char *GlobalVarAddrPrefix; // Defaults to ""
const char *GlobalVarAddrSuffix; // Defaults to ""
/// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
/// will enclose any GlobalVariable that points to a function.
/// For example, this is used by the IA64 backend to materialize
/// function descriptors, by decorating the ".data8" object with the
/// @fptr( ) link-relocation operator.
///
const char *FunctionAddrPrefix; // Defaults to ""
const char *FunctionAddrSuffix; // Defaults to ""
/// ZeroDirective - this should be set to the directive used to get some
/// number of zero bytes emitted to the current section. Common cases are
/// "\t.zero\t" and "\t.space\t". If this is set to null, the
@ -87,6 +102,10 @@ namespace llvm {
: O(o), TM(tm),
CommentString("#"),
GlobalPrefix(""),
GlobalVarAddrPrefix(""),
GlobalVarAddrSuffix(""),
FunctionAddrPrefix(""),
FunctionAddrSuffix(""),
ZeroDirective("\t.zero\t"),
AsciiDirective("\t.ascii\t"),
Data8bitsDirective("\t.byte\t"),

15
lib/CodeGen/AsmPrinter.cpp
View File

@ -67,11 +67,16 @@ void AsmPrinter::emitConstantValueOnly(const Constant *CV) {
O << (unsigned long long)CI->getValue();
else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
O << CI->getValue();
else if (isa<GlobalValue>((Value*)CV))
// This is a constant address for a global variable or function. Use the
// name of the variable or function as the address value.
O << Mang->getValueName(CV);
else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
else if (isa<GlobalValue>((Value*)CV)) {
// This is a constant address for a global variable or function. Use the
// name of the variable or function as the address value, possibly
// decorating it with GlobalVarAddrPrefix/Suffix or
// FunctionAddrPrefix/Suffix (these all default to "" )
if (isa<Function>((Value*)CV))
O << FunctionAddrPrefix << Mang->getValueName(CV) << FunctionAddrSuffix;
else
O << GlobalVarAddrPrefix << Mang->getValueName(CV) << GlobalVarAddrSuffix;
} else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
const TargetData &TD = TM.getTargetData();
switch(CE->getOpcode()) {
case Instruction::GetElementPtr: {