-//===- SparcSubtarget.cpp - SPARC Subtarget Information -------------------===//
+//===-- SparcSubtarget.cpp - SPARC Subtarget Information ------------------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "SparcSubtarget.h"
+#include "Sparc.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/TargetRegistry.h"
-#define GET_SUBTARGETINFO_CTOR
-#define GET_SUBTARGETINFO_MC_DESC
#define GET_SUBTARGETINFO_TARGET_DESC
+#define GET_SUBTARGETINFO_CTOR
#include "SparcGenSubtargetInfo.inc"
using namespace llvm;
+void SparcSubtarget::anchor() { }
+
SparcSubtarget::SparcSubtarget(const std::string &TT, const std::string &CPU,
const std::string &FS, bool is64Bit) :
- SparcGenSubtargetInfo(),
+ SparcGenSubtargetInfo(TT, CPU, FS),
IsV9(false),
V8DeprecatedInsts(false),
IsVIS(false),
- Is64Bit(is64Bit) {
-
+ Is64Bit(is64Bit),
+ HasHardQuad(false),
+ UsePopc(false) {
+
// Determine default and user specified characteristics
std::string CPUName = CPU;
- if (CPUName.empty()) {
- if (is64Bit)
- CPUName = "v9";
- else
- CPUName = "v8";
- }
- IsV9 = CPUName == "v9";
+ if (CPUName.empty())
+ CPUName = (is64Bit) ? "v9" : "v8";
// Parse features string.
- ParseSubtargetFeatures(FS, CPUName);
+ ParseSubtargetFeatures(CPUName, FS);
+
+ // Popc is a v9-only instruction.
+ if (!IsV9)
+ UsePopc = false;
+}
+
+
+int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
+
+ if (is64Bit()) {
+ // All 64-bit stack frames must be 16-byte aligned, and must reserve space
+ // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
+ frameSize += 128;
+ // Frames with calls must also reserve space for 6 outgoing arguments
+ // whether they are used or not. LowerCall_64 takes care of that.
+ assert(frameSize % 16 == 0 && "Stack size not 16-byte aligned");
+ } else {
+ // Emit the correct save instruction based on the number of bytes in
+ // the frame. Minimum stack frame size according to V8 ABI is:
+ // 16 words for register window spill
+ // 1 word for address of returned aggregate-value
+ // + 6 words for passing parameters on the stack
+ // ----------
+ // 23 words * 4 bytes per word = 92 bytes
+ frameSize += 92;
+
+ // Round up to next doubleword boundary -- a double-word boundary
+ // is required by the ABI.
+ frameSize = RoundUpToAlignment(frameSize, 8);
+ }
+ return frameSize;
}