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-rw-r--r--include/llvm/Target/Target.td13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/llvm/Target/Target.td b/include/llvm/Target/Target.td
index 68f0515..ab6a4e2 100644
--- a/include/llvm/Target/Target.td
+++ b/include/llvm/Target/Target.td
@@ -128,6 +128,11 @@ class RegisterClass<string namespace, list<ValueType> regTypes, int alignment,
// dags: (RegClass SubRegIndex, SubRegindex, ...)
list<dag> SubRegClasses = [];
+ // isAllocatable - Specify that the register class can be used for virtual
+ // registers and register allocation. Some register classes are only used to
+ // model instruction operand constraints, and should have isAllocatable = 0.
+ bit isAllocatable = 1;
+
// MethodProtos/MethodBodies - These members can be used to insert arbitrary
// code into a generated register class. The normal usage of this is to
// overload virtual methods.
@@ -151,6 +156,14 @@ class DwarfRegNum<list<int> Numbers> {
list<int> DwarfNumbers = Numbers;
}
+// DwarfRegAlias - This class declares that a given register uses the same dwarf
+// numbers as another one. This is useful for making it clear that the two
+// registers do have the same number. It also lets us build a mapping
+// from dwarf register number to llvm register.
+class DwarfRegAlias<Register reg> {
+ Register DwarfAlias = reg;
+}
+
//===----------------------------------------------------------------------===//
// Pull in the common support for scheduling
//
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