diff options
Diffstat (limited to 'lib/Target/PowerPC/PPCFrameLowering.h')
-rw-r--r-- | lib/Target/PowerPC/PPCFrameLowering.h | 198 |
1 files changed, 9 insertions, 189 deletions
diff --git a/lib/Target/PowerPC/PPCFrameLowering.h b/lib/Target/PowerPC/PPCFrameLowering.h index 94e9b67..7a226f7 100644 --- a/lib/Target/PowerPC/PPCFrameLowering.h +++ b/lib/Target/PowerPC/PPCFrameLowering.h @@ -14,23 +14,18 @@ #define POWERPC_FRAMEINFO_H #include "PPC.h" -#include "PPCSubtarget.h" #include "llvm/ADT/STLExtras.h" #include "llvm/Target/TargetFrameLowering.h" #include "llvm/Target/TargetMachine.h" namespace llvm { - class PPCSubtarget; +class PPCSubtarget; class PPCFrameLowering: public TargetFrameLowering { const PPCSubtarget &Subtarget; public: - PPCFrameLowering(const PPCSubtarget &sti) - : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, - (sti.hasQPX() || sti.isBGQ()) ? 32 : 16, 0), - Subtarget(sti) { - } + PPCFrameLowering(const PPCSubtarget &STI); unsigned determineFrameLayout(MachineFunction &MF, bool UpdateMF = true, @@ -79,6 +74,12 @@ public: return isPPC64 ? 16 : 4; } + /// getTOCSaveOffset - Return the previous frame offset to save the + /// TOC register -- 64-bit SVR4 ABI only. + static unsigned getTOCSaveOffset(void) { + return 40; + } + /// getFramePointerSaveOffset - Return the previous frame offset to save the /// frame pointer. static unsigned getFramePointerSaveOffset(bool isPPC64, bool isDarwinABI) { @@ -114,190 +115,9 @@ public: return 8; } - /// getMinCallArgumentsSize - Return the size of the minium PowerPC ABI - /// argument area. - static unsigned getMinCallArgumentsSize(bool isPPC64, bool isDarwinABI) { - // For the Darwin ABI / 64-bit SVR4 ABI: - // The prolog code of the callee may store up to 8 GPR argument registers to - // the stack, allowing va_start to index over them in memory if its varargs. - // Because we cannot tell if this is needed on the caller side, we have to - // conservatively assume that it is needed. As such, make sure we have at - // least enough stack space for the caller to store the 8 GPRs. - if (isDarwinABI || isPPC64) - return 8 * (isPPC64 ? 8 : 4); - - // 32-bit SVR4 ABI: - // There is no default stack allocated for the 8 first GPR arguments. - return 0; - } - - /// getMinCallFrameSize - Return the minimum size a call frame can be using - /// the PowerPC ABI. - static unsigned getMinCallFrameSize(bool isPPC64, bool isDarwinABI) { - // The call frame needs to be at least big enough for linkage and 8 args. - return getLinkageSize(isPPC64, isDarwinABI) + - getMinCallArgumentsSize(isPPC64, isDarwinABI); - } - - // With the SVR4 ABI, callee-saved registers have fixed offsets on the stack. const SpillSlot * - getCalleeSavedSpillSlots(unsigned &NumEntries) const override { - if (Subtarget.isDarwinABI()) { - NumEntries = 1; - if (Subtarget.isPPC64()) { - static const SpillSlot darwin64Offsets = {PPC::X31, -8}; - return &darwin64Offsets; - } else { - static const SpillSlot darwinOffsets = {PPC::R31, -4}; - return &darwinOffsets; - } - } - - // Early exit if not using the SVR4 ABI. - if (!Subtarget.isSVR4ABI()) { - NumEntries = 0; - return nullptr; - } - - // Note that the offsets here overlap, but this is fixed up in - // processFunctionBeforeFrameFinalized. - - static const SpillSlot Offsets[] = { - // Floating-point register save area offsets. - {PPC::F31, -8}, - {PPC::F30, -16}, - {PPC::F29, -24}, - {PPC::F28, -32}, - {PPC::F27, -40}, - {PPC::F26, -48}, - {PPC::F25, -56}, - {PPC::F24, -64}, - {PPC::F23, -72}, - {PPC::F22, -80}, - {PPC::F21, -88}, - {PPC::F20, -96}, - {PPC::F19, -104}, - {PPC::F18, -112}, - {PPC::F17, -120}, - {PPC::F16, -128}, - {PPC::F15, -136}, - {PPC::F14, -144}, - - // General register save area offsets. - {PPC::R31, -4}, - {PPC::R30, -8}, - {PPC::R29, -12}, - {PPC::R28, -16}, - {PPC::R27, -20}, - {PPC::R26, -24}, - {PPC::R25, -28}, - {PPC::R24, -32}, - {PPC::R23, -36}, - {PPC::R22, -40}, - {PPC::R21, -44}, - {PPC::R20, -48}, - {PPC::R19, -52}, - {PPC::R18, -56}, - {PPC::R17, -60}, - {PPC::R16, -64}, - {PPC::R15, -68}, - {PPC::R14, -72}, - - // CR save area offset. We map each of the nonvolatile CR fields - // to the slot for CR2, which is the first of the nonvolatile CR - // fields to be assigned, so that we only allocate one save slot. - // See PPCRegisterInfo::hasReservedSpillSlot() for more information. - {PPC::CR2, -4}, - - // VRSAVE save area offset. - {PPC::VRSAVE, -4}, - - // Vector register save area - {PPC::V31, -16}, - {PPC::V30, -32}, - {PPC::V29, -48}, - {PPC::V28, -64}, - {PPC::V27, -80}, - {PPC::V26, -96}, - {PPC::V25, -112}, - {PPC::V24, -128}, - {PPC::V23, -144}, - {PPC::V22, -160}, - {PPC::V21, -176}, - {PPC::V20, -192} - }; - - static const SpillSlot Offsets64[] = { - // Floating-point register save area offsets. - {PPC::F31, -8}, - {PPC::F30, -16}, - {PPC::F29, -24}, - {PPC::F28, -32}, - {PPC::F27, -40}, - {PPC::F26, -48}, - {PPC::F25, -56}, - {PPC::F24, -64}, - {PPC::F23, -72}, - {PPC::F22, -80}, - {PPC::F21, -88}, - {PPC::F20, -96}, - {PPC::F19, -104}, - {PPC::F18, -112}, - {PPC::F17, -120}, - {PPC::F16, -128}, - {PPC::F15, -136}, - {PPC::F14, -144}, - - // General register save area offsets. - {PPC::X31, -8}, - {PPC::X30, -16}, - {PPC::X29, -24}, - {PPC::X28, -32}, - {PPC::X27, -40}, - {PPC::X26, -48}, - {PPC::X25, -56}, - {PPC::X24, -64}, - {PPC::X23, -72}, - {PPC::X22, -80}, - {PPC::X21, -88}, - {PPC::X20, -96}, - {PPC::X19, -104}, - {PPC::X18, -112}, - {PPC::X17, -120}, - {PPC::X16, -128}, - {PPC::X15, -136}, - {PPC::X14, -144}, - - // VRSAVE save area offset. - {PPC::VRSAVE, -4}, - - // Vector register save area - {PPC::V31, -16}, - {PPC::V30, -32}, - {PPC::V29, -48}, - {PPC::V28, -64}, - {PPC::V27, -80}, - {PPC::V26, -96}, - {PPC::V25, -112}, - {PPC::V24, -128}, - {PPC::V23, -144}, - {PPC::V22, -160}, - {PPC::V21, -176}, - {PPC::V20, -192} - }; - - if (Subtarget.isPPC64()) { - NumEntries = array_lengthof(Offsets64); - - return Offsets64; - } else { - NumEntries = array_lengthof(Offsets); - - return Offsets; - } - } + getCalleeSavedSpillSlots(unsigned &NumEntries) const override; }; - } // End llvm namespace #endif |