Vendor import of llvm trunk r135360:

http://llvm.org/svn/llvm-project/llvm/trunk@135360

1 files changed, 16 insertions, 14 deletions

diff --git a/lib/CodeGen/RegAllocBasic.cpp b/lib/CodeGen/RegAllocBasic.cpp
index 1d77b29..5ea26ad 100644
--- a/lib/CodeGen/RegAllocBasic.cpp
+++ b/lib/CodeGen/RegAllocBasic.cpp
@@ -20,6 +20,7 @@
 #include "RenderMachineFunction.h"
 #include "Spiller.h"
 #include "VirtRegMap.h"
+#include "RegisterCoalescer.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/AliasAnalysis.h"
@@ -34,7 +35,6 @@
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/RegAllocRegistry.h"
-#include "llvm/CodeGen/RegisterCoalescer.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/Target/TargetRegisterInfo.h"
@@ -141,7 +141,7 @@ RABasic::RABasic(): MachineFunctionPass(ID) {
   initializeLiveIntervalsPass(*PassRegistry::getPassRegistry());
   initializeSlotIndexesPass(*PassRegistry::getPassRegistry());
   initializeStrongPHIEliminationPass(*PassRegistry::getPassRegistry());
-  initializeRegisterCoalescerAnalysisGroup(*PassRegistry::getPassRegistry());
+  initializeRegisterCoalescerPass(*PassRegistry::getPassRegistry());
   initializeCalculateSpillWeightsPass(*PassRegistry::getPassRegistry());
   initializeLiveStacksPass(*PassRegistry::getPassRegistry());
   initializeMachineDominatorTreePass(*PassRegistry::getPassRegistry());
@@ -324,19 +324,21 @@ void RegAllocBase::allocatePhysRegs() {
 
     if (AvailablePhysReg == ~0u) {
       // selectOrSplit failed to find a register!
-      std::string msg;
-      raw_string_ostream Msg(msg);
-      Msg << "Ran out of registers during register allocation!"
-             "\nCannot allocate: " << *VirtReg;
+      const char *Msg = "ran out of registers during register allocation";
+      // Probably caused by an inline asm.
+      MachineInstr *MI;
       for (MachineRegisterInfo::reg_iterator I = MRI->reg_begin(VirtReg->reg);
-      MachineInstr *MI = I.skipInstruction();) {
-        if (!MI->isInlineAsm())
-          continue;
-        Msg << "\nPlease check your inline asm statement for "
-          "invalid constraints:\n";
-        MI->print(Msg, &VRM->getMachineFunction().getTarget());
-      }
-      report_fatal_error(Msg.str());
+           (MI = I.skipInstruction());)
+        if (MI->isInlineAsm())
+          break;
+      if (MI)
+        MI->emitError(Msg);
+      else
+        report_fatal_error(Msg);
+      // Keep going after reporting the error.
+      VRM->assignVirt2Phys(VirtReg->reg,
+                 RegClassInfo.getOrder(MRI->getRegClass(VirtReg->reg)).front());
+      continue;
     }
 
     if (AvailablePhysReg)