#define DEBUG_TYPE "x86-codegen"
#include "X86.h"
#include "X86InstrInfo.h"
+#include "llvm/ADT/DepthFirstIterator.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/ADT/DepthFirstIterator.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/STLExtras.h"
#include <algorithm>
using namespace llvm;
FPS() : MachineFunctionPass(&ID) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesCFG();
AU.addPreservedID(MachineLoopInfoID);
AU.addPreservedID(MachineDominatorsID);
MachineFunctionPass::getAnalysisUsage(AU);
PrevMI = prior(I);
++NumFP; // Keep track of # of pseudo instrs
- DOUT << "\nFPInst:\t" << *MI;
+ DEBUG(errs() << "\nFPInst:\t" << *MI);
// Get dead variables list now because the MI pointer may be deleted as part
// of processing!
case X86II::CompareFP: handleCompareFP(I); break;
case X86II::CondMovFP: handleCondMovFP(I); break;
case X86II::SpecialFP: handleSpecialFP(I); break;
- default: assert(0 && "Unknown FP Type!");
+ default: llvm_unreachable("Unknown FP Type!");
}
// Check to see if any of the values defined by this instruction are dead
for (unsigned i = 0, e = DeadRegs.size(); i != e; ++i) {
unsigned Reg = DeadRegs[i];
if (Reg >= X86::FP0 && Reg <= X86::FP6) {
- DOUT << "Register FP#" << Reg-X86::FP0 << " is dead!\n";
+ DEBUG(errs() << "Register FP#" << Reg-X86::FP0 << " is dead!\n");
freeStackSlotAfter(I, Reg-X86::FP0);
}
}
MachineInstr *MI = I;
DebugLoc dl = MI->getDebugLoc();
switch (MI->getOpcode()) {
- default: assert(0 && "Unknown SpecialFP instruction!");
+ default: llvm_unreachable("Unknown SpecialFP instruction!");
case X86::FpGET_ST0_32:// Appears immediately after a call returning FP type!
case X86::FpGET_ST0_64:// Appears immediately after a call returning FP type!
case X86::FpGET_ST0_80:// Appears immediately after a call returning FP type!
}
case X86::FpSET_ST0_32:
case X86::FpSET_ST0_64:
- case X86::FpSET_ST0_80:
- assert((StackTop == 1 || StackTop == 2)
- && "Stack should have one or two element on it to return!");
+ case X86::FpSET_ST0_80: {
+ unsigned Op0 = getFPReg(MI->getOperand(0));
+
+ // FpSET_ST0_80 is generated by copyRegToReg for both function return
+ // and inline assembly with the "st" constrain. In the latter case,
+ // it is possible for ST(0) to be alive after this instruction.
+ if (!MI->killsRegister(X86::FP0 + Op0)) {
+ // Duplicate Op0
+ duplicateToTop(0, 7 /*temp register*/, I);
+ } else {
+ moveToTop(Op0, I);
+ }
--StackTop; // "Forget" we have something on the top of stack!
break;
+ }
case X86::FpSET_ST1_32:
case X86::FpSET_ST1_64:
case X86::FpSET_ST1_80: