#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetInstrInfo.h"
STATISTIC(NumVirtualFrameRegs, "Number of virtual frame regs encountered");
STATISTIC(NumScavengedRegs, "Number of frame index regs scavenged");
+STATISTIC(NumBytesStackSpace,
+ "Number of bytes used for stack in all functions");
/// createPrologEpilogCodeInserter - This function returns a pass that inserts
/// prolog and epilog code, and eliminates abstract frame references.
}
// Update frame info to pretend that this is part of the stack...
- MFI->setStackSize(Offset - LocalAreaOffset);
+ int64_t StackSize = Offset - LocalAreaOffset;
+ MFI->setStackSize(StackSize);
+ NumBytesStackSpace += StackSize;
}
/// insertPrologEpilogCode - Scan the function for modified callee saved
if (!I->empty() && I->back().getDesc().isReturn())
TFI.emitEpilogue(Fn, *I);
}
+
+ // Emit additional code that is required to support segmented stacks, if
+ // we've been asked for it. This, when linked with a runtime with support
+ // for segmented stacks (libgcc is one), will result in allocating stack
+ // space in small chunks instead of one large contiguous block.
+ if (EnableSegmentedStacks)
+ TFI.adjustForSegmentedStacks(Fn);
}
/// replaceFrameIndices - Replace all MO_FrameIndex operands with physical