[Sparc] Implement i64 load/store support for 32-bit sparc.

[oota-llvm.git] / lib / Target / Sparc / SparcFrameLowering.cpp

diff --git a/lib/Target/Sparc/SparcFrameLowering.cpp b/lib/Target/Sparc/SparcFrameLowering.cpp
index c0279daa63d913c83ae9d958396a1af93c5e1be3..15f200238aee8362243d0ab5bc3a8d9ee9790902 100644 (file)
--- a/lib/Target/Sparc/SparcFrameLowering.cpp
+++ b/lib/Target/Sparc/SparcFrameLowering.cpp
@@ -190,11 +190,11 @@ static bool LLVM_ATTRIBUTE_UNUSED verifyLeafProcRegUse(MachineRegisterInfo *MRI)
 {
 
   for (unsigned reg = SP::I0; reg <= SP::I7; ++reg)
-    if (MRI->isPhysRegUsed(reg))
+    if (!MRI->reg_nodbg_empty(reg))
       return false;
 
   for (unsigned reg = SP::L0; reg <= SP::L7; ++reg)
-    if (MRI->isPhysRegUsed(reg))
+    if (!MRI->reg_nodbg_empty(reg))
       return false;
 
   return true;
@@ -206,33 +206,42 @@ bool SparcFrameLowering::isLeafProc(MachineFunction &MF) const
   MachineRegisterInfo &MRI = MF.getRegInfo();
   MachineFrameInfo    *MFI = MF.getFrameInfo();
 
-  return !(MFI->hasCalls()              // has calls
-           || MRI.isPhysRegUsed(SP::L0) // Too many registers needed
-           || MRI.isPhysRegUsed(SP::O6) // %SP is used
-           || hasFP(MF));               // need %FP
+  return !(MFI->hasCalls()                 // has calls
+           || !MRI.reg_nodbg_empty(SP::L0) // Too many registers needed
+           || !MRI.reg_nodbg_empty(SP::O6) // %SP is used
+           || hasFP(MF));                  // need %FP
 }
 
 void SparcFrameLowering::remapRegsForLeafProc(MachineFunction &MF) const {
-
   MachineRegisterInfo &MRI = MF.getRegInfo();
-
   // Remap %i[0-7] to %o[0-7].
   for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
-    if (!MRI.isPhysRegUsed(reg))
+    if (MRI.reg_nodbg_empty(reg))
       continue;
-    unsigned mapped_reg = (reg - SP::I0 + SP::O0);
-    assert(!MRI.isPhysRegUsed(mapped_reg));
+
+    unsigned mapped_reg = reg - SP::I0 + SP::O0;
+    assert(MRI.reg_nodbg_empty(mapped_reg));
 
     // Replace I register with O register.
     MRI.replaceRegWith(reg, mapped_reg);
 
-    // Mark the reg unused.
-    MRI.setPhysRegUnused(reg);
+    // Also replace register pair super-registers.
+    if ((reg - SP::I0) % 2 == 0) {
+      unsigned preg = (reg - SP::I0) / 2 + SP::I0_I1;
+      unsigned mapped_preg = preg - SP::I0_I1 + SP::O0_O1;
+      MRI.replaceRegWith(preg, mapped_preg);
+    }
   }
 
   // Rewrite MBB's Live-ins.
   for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
        MBB != E; ++MBB) {
+    for (unsigned reg = SP::I0_I1; reg <= SP::I6_I7; ++reg) {
+      if (!MBB->isLiveIn(reg))
+        continue;
+      MBB->removeLiveIn(reg);
+      MBB->addLiveIn(reg - SP::I0_I1 + SP::O0_O1);
+    }
     for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
       if (!MBB->isLiveIn(reg))
         continue;