Factor out GVRequiresExtraLoad() from .h to .cpp
llvm-svn: 32048
diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index ea185b9..2459ed1 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -27,6 +27,23 @@
clEnumValEnd));
+/// True if accessing the GV requires an extra load. For Windows, dllimported
+/// symbols are indirect, loading the value at address GV rather then the
+/// 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 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());
+ }
+
+ return false;
+}
+
/// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in the
/// specified arguments. If we can't run cpuid on the host, return true.
bool X86::GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,