Fix the use of x86 control and debug registers so that the assertion failure in

getX86RegNum() does not happen.  Patch by Shantonu Sen!

llvm-svn: 104994

llvm/lib/Target/X86/X86RegisterInfo.cpp

@@ -157,6 +157,34 @@ unsigned X86RegisterInfo::getX86RegNum(unsigned RegNo) {
   case X86::GS:
     return 5;
 
+  case X86::CR0:
+    return 0;
+  case X86::CR1:
+    return 1;
+  case X86::CR2:
+    return 2;
+  case X86::CR3:
+    return 3;
+  case X86::CR4:
+    return 4;
+
+  case X86::DR0:
+    return 0;
+  case X86::DR1:
+    return 1;
+  case X86::DR2:
+    return 2;
+  case X86::DR3:
+    return 3;
+  case X86::DR4:
+    return 4;
+  case X86::DR5:
+    return 5;
+  case X86::DR6:
+    return 6;
+  case X86::DR7:
+    return 7;
+
   default:
     assert(isVirtualRegister(RegNo) && "Unknown physical register!");
     llvm_unreachable("Register allocator hasn't allocated reg correctly yet!");

llvm/test/MC/AsmParser/X86/x86_32-new-encoder.s

@@ -331,3 +331,60 @@ retl
 // CHECK: movw	(%eax), %cs
 // CHECK:  encoding: [0x66,0x8e,0x08]
         movw (%eax), %cs
+
+// radr://8033374
+// CHECK: movl	%cr0, %eax
+// CHECK:  encoding: [0x0f,0x20,0xc0]
+        movl %cr0,%eax
+
+// CHECK: movl	%cr1, %eax
+// CHECK:  encoding: [0x0f,0x20,0xc8]
+        movl %cr1,%eax
+
+// CHECK: movl	%cr2, %eax
+// CHECK:  encoding: [0x0f,0x20,0xd0]
+        movl %cr2,%eax
+
+// CHECK: movl	%cr3, %eax
+// CHECK:  encoding: [0x0f,0x20,0xd8]
+        movl %cr3,%eax
+
+// CHECK: movl	%cr4, %eax
+// CHECK:  encoding: [0x0f,0x20,0xe0]
+        movl %cr4,%eax
+
+// CHECK: movl	%dr0, %eax
+// CHECK:  encoding: [0x0f,0x21,0xc0]
+        movl %dr0,%eax
+
+// CHECK: movl	%dr1, %eax
+// CHECK:  encoding: [0x0f,0x21,0xc8]
+        movl %dr1,%eax
+
+// CHECK: movl	%dr1, %eax
+// CHECK:  encoding: [0x0f,0x21,0xc8]
+        movl %dr1,%eax
+
+// CHECK: movl	%dr2, %eax
+// CHECK:  encoding: [0x0f,0x21,0xd0]
+        movl %dr2,%eax
+
+// CHECK: movl	%dr3, %eax
+// CHECK:  encoding: [0x0f,0x21,0xd8]
+        movl %dr3,%eax
+
+// CHECK: movl	%dr4, %eax
+// CHECK:  encoding: [0x0f,0x21,0xe0]
+        movl %dr4,%eax
+
+// CHECK: movl	%dr5, %eax
+// CHECK:  encoding: [0x0f,0x21,0xe8]
+        movl %dr5,%eax
+
+// CHECK: movl	%dr6, %eax
+// CHECK:  encoding: [0x0f,0x21,0xf0]
+        movl %dr6,%eax
+
+// CHECK: movl	%dr7, %eax
+// CHECK:  encoding: [0x0f,0x21,0xf8]
+        movl %dr7,%eax