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Fixed dllimported symbols support during JIT'ing. JIT on mingw32

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platform should be more or less workable. At least, sim is running fine
under lli :)

llvm-svn: 32711
This commit is contained in:
Anton Korobeynikov 2006-12-20 01:03:20 +00:00
parent 87e0f0787e
commit 76dbbd6e24
3 changed files with 28 additions and 7 deletions
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25
lib/Target/X86/X86Subtarget.cpp
View File

@ -32,13 +32,14 @@ AsmWriterFlavor("x86-asm-syntax", cl::init(X86Subtarget::unset),
/// or index register of the address, not the GV offset field.
bool X86Subtarget::GVRequiresExtraLoad(const GlobalValue* GV, bool isDirectCall) const
{
if (isTargetDarwin()) {
return (!isDirectCall &&
(GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
(GV->isExternal() && !GV->hasNotBeenReadFromBytecode())));
} else if (isTargetCygwin() || isTargetWindows()) {
return (GV->hasDLLImportLinkage());
}
if (GenerateExtraLoadsForGVs)
if (isTargetDarwin()) {
return (!isDirectCall &&
(GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
(GV->isExternal() && !GV->hasNotBeenReadFromBytecode())));
} else if (isTargetCygwin() || isTargetWindows()) {
return (GV->hasDLLImportLinkage());
}
return false;
}
@ -206,6 +207,15 @@ static const char *GetCurrentX86CPU() {
}
}
/// SetJITMode - This is called to inform the subtarget info that we are
/// producing code for the JIT.
void X86Subtarget::SetJITMode() {
// JIT mode doesn't want extra loads for dllimported symbols, it knows exactly
// where everything is.
if (isTargetCygwin())
GenerateExtraLoadsForGVs = false;
}
X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
: AsmFlavor(AsmWriterFlavor)
, X86SSELevel(NoMMXSSE)
@ -214,6 +224,7 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
// FIXME: this is a known good value for Yonah. How about others?
, MinRepStrSizeThreshold(128)
, Is64Bit(is64Bit)
, GenerateExtraLoadsForGVs(true)
, TargetType(isELF) { // Default to ELF unless otherwise specified.
// Determine default and user specified characteristics

7
lib/Target/X86/X86Subtarget.h
View File

@ -61,6 +61,9 @@ private:
/// pointer size is 64 bit.
bool Is64Bit;
/// GenerateExtraLoadsForGVs - True if we should generate extra loads for
/// indirect symbols (e.g. dllimported symbols on windows).
bool GenerateExtraLoadsForGVs;
public:
enum {
isELF, isCygwin, isDarwin, isWindows
@ -112,6 +115,10 @@ public:
/// value of GV itself. This means that the GlobalAddress must be in the base
/// or index register of the address, not the GV offset field.
bool GVRequiresExtraLoad(const GlobalValue* GV, bool isDirectCall) const;
/// SetJITMode - This is called to inform the subtarget info that we are
/// producing code for the JIT.
void SetJITMode();
};
namespace X86 {

3
lib/Target/X86/X86TargetMachine.cpp
View File

@ -166,6 +166,9 @@ bool X86TargetMachine::addCodeEmitter(FunctionPassManager &PM, bool Fast,
// JIT cannot ensure globals are placed in the lower 4G of address.
if (Subtarget.is64Bit())
setCodeModel(CodeModel::Large);
// Inform the subtarget that we are in JIT mode.
Subtarget.SetJITMode();
PM.add(createX86CodeEmitterPass(*this, MCE));
return false;