Implement the local-dynamic TLS model for x86 (PR3985)
This implements codegen support for accesses to thread-local variables
using the local-dynamic model, and adds a clean-up pass so that the base
address for the TLS block can be re-used between local-dynamic access on
an execution path.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157818 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86MachineFunctionInfo.h b/lib/Target/X86/X86MachineFunctionInfo.h
index c747109..2bc308d 100644
--- a/lib/Target/X86/X86MachineFunctionInfo.h
+++ b/lib/Target/X86/X86MachineFunctionInfo.h
@@ -66,6 +66,8 @@
/// ArgumentStackSize - The number of bytes on stack consumed by the arguments
/// being passed on the stack.
unsigned ArgumentStackSize;
+ /// NumLocalDynamics - Number of local-dynamic TLS accesses.
+ unsigned NumLocalDynamics;
public:
X86MachineFunctionInfo() : ForceFramePointer(false),
@@ -79,7 +81,8 @@
RegSaveFrameIndex(0),
VarArgsGPOffset(0),
VarArgsFPOffset(0),
- ArgumentStackSize(0) {}
+ ArgumentStackSize(0),
+ NumLocalDynamics(0) {}
explicit X86MachineFunctionInfo(MachineFunction &MF)
: ForceFramePointer(false),
@@ -93,7 +96,8 @@
RegSaveFrameIndex(0),
VarArgsGPOffset(0),
VarArgsFPOffset(0),
- ArgumentStackSize(0) {}
+ ArgumentStackSize(0),
+ NumLocalDynamics(0) {}
bool getForceFramePointer() const { return ForceFramePointer;}
void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
@@ -130,6 +134,9 @@
unsigned getArgumentStackSize() const { return ArgumentStackSize; }
void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
+
+ unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
+ void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
};
} // End llvm namespace