Changes recommended by Chris:

InstSelectSimple.cpp:
  Change the checks for proper I/O port address size into an exit() instead
  of an assertion.  Assertions aren't used in Release builds, and handling
  this error should be graceful (not that this counts as graceful, but it's
  more graceful).

  Modified the generation of the IN/OUT instructions to have 0 arguments.
X86InstrInfo.td:
  Added the OpSize attribute to the 16 bit IN and OUT instructions.

llvm-svn: 12786

2 files changed, 17 insertions, 12 deletions

diff --git a/llvm/lib/Target/X86/InstSelectSimple.cpp b/llvm/lib/Target/X86/InstSelectSimple.cpp
index 4988a0dc4c6..3ceefe7ccd9 100644
--- a/llvm/lib/Target/X86/InstSelectSimple.cpp
+++ b/llvm/lib/Target/X86/InstSelectSimple.cpp
@@ -1670,8 +1670,10 @@ void ISel::visitIntrinsicCall(Intrinsic::ID ID, CallInst &CI) {
     // First, determine that the size of the operand falls within the
     // acceptable range for this architecture.
     //
-    assert (((CI.getOperand(1)->getType()->getPrimitiveSize()) == 2) &&
-            "llvm.readport operand size is not a 16 bit value!");
+    if ((CI.getOperand(1)->getType()->getPrimitiveSize()) != 2) {
+      std::cerr << "llvm.readport: Address size is not 16 bits\n";
+      exit (1);
+    }
 
     //
     // Now, move the I/O port address into the DX register and use the IN
@@ -1680,13 +1682,13 @@ void ISel::visitIntrinsicCall(Intrinsic::ID ID, CallInst &CI) {
     BuildMI(BB, X86::MOV16rr, 1, X86::DX).addReg(getReg(CI.getOperand(1)));
     switch (CI.getCalledFunction()->getReturnType()->getPrimitiveSize()) {
       case 1:
-        BuildMI(BB, X86::IN8, 1);
+        BuildMI(BB, X86::IN8, 0);
         break;
       case 2:
-        BuildMI(BB, X86::IN16, 1);
+        BuildMI(BB, X86::IN16, 0);
         break;
       case 4:
-        BuildMI(BB, X86::IN32, 1);
+        BuildMI(BB, X86::IN32, 0);
         break;
       default:
         assert (0 && "Cannot do input on this data type");
@@ -1698,8 +1700,11 @@ void ISel::visitIntrinsicCall(Intrinsic::ID ID, CallInst &CI) {
     // First, determine that the size of the operand falls within the
     // acceptable range for this architecture.
     //
-    assert (((CI.getOperand(1)->getType()->getPrimitiveSize()) == 2) &&
-            "llvm.readport operand size is not a 16 bit value!");
+    //
+    if ((CI.getOperand(1)->getType()->getPrimitiveSize()) != 2) {
+      std::cerr << "llvm.writeport: Address size is not 16 bits\n";
+      exit (1);
+    }
 
     //
     // Now, move the I/O port address into the DX register and the value to
@@ -1709,15 +1714,15 @@ void ISel::visitIntrinsicCall(Intrinsic::ID ID, CallInst &CI) {
     switch (CI.getOperand(2)->getType()->getPrimitiveSize()) {
       case 1:
         BuildMI(BB, X86::MOV8rr, 1, X86::AL).addReg(getReg(CI.getOperand(2)));
-        BuildMI(BB, X86::OUT8, 1);
+        BuildMI(BB, X86::OUT8, 0);
         break;
       case 2:
         BuildMI(BB, X86::MOV16rr, 1, X86::AX).addReg(getReg(CI.getOperand(2)));
-        BuildMI(BB, X86::OUT16, 1);
+        BuildMI(BB, X86::OUT16, 0);
         break;
       case 4:
         BuildMI(BB, X86::MOV32rr, 1, X86::EAX).addReg(getReg(CI.getOperand(2)));
-        BuildMI(BB, X86::OUT32, 1);
+        BuildMI(BB, X86::OUT32, 0);
         break;
       default:
         assert (0 && "Cannot do input on this data type");
diff --git a/llvm/lib/Target/X86/X86InstrInfo.td b/llvm/lib/Target/X86/X86InstrInfo.td
index 1ddaaabd826..12d10c333be 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.td
+++ b/llvm/lib/Target/X86/X86InstrInfo.td
@@ -249,11 +249,11 @@ def REP_STOSD : I<"rep stosd", 0xAB, RawFrm>, REP,
 //  Input/Output Instructions...
 //
 def IN8  : I<"in", 0xEC, RawFrm>, Imp<[DX],[AL]>,  PrintImpUsesAfter, PrintImpDefsAfter;    // in AL  = I/O address DX
-def IN16 : I<"in", 0xED, RawFrm>, Imp<[DX],[AX]>,  PrintImpUsesAfter, PrintImpDefsAfter;    // in AX  = I/O address DX
+def IN16 : I<"in", 0xED, RawFrm>, Imp<[DX],[AX]>,  OpSize, PrintImpUsesAfter, PrintImpDefsAfter;    // in AX  = I/O address DX
 def IN32 : I<"in", 0xED, RawFrm>, Imp<[DX],[EAX]>, PrintImpUsesAfter, PrintImpDefsAfter;   // in EAX = I/O address DX
 
 def OUT8  : I<"out", 0xEE, RawFrm>, Imp<[DX, AL],  []>, PrintImpUsesAfter;
-def OUT16 : I<"out", 0xEF, RawFrm>, Imp<[DX, AX],  []>, PrintImpUsesAfter;
+def OUT16 : I<"out", 0xEF, RawFrm>, Imp<[DX, AX],  []>, OpSize, PrintImpUsesAfter;
 def OUT32 : I<"out", 0xEF, RawFrm>, Imp<[DX, EAX], []>, PrintImpUsesAfter;
 
 //===----------------------------------------------------------------------===//