Inline asm multiple alternative constraints development phase 2 - improved basic logic, added initial platform support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117667 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp
index efd0d2c..9ae06ea 100644
--- a/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -27,6 +27,7 @@
#include "llvm/Function.h"
#include "llvm/Module.h"
#include "llvm/Intrinsics.h"
+#include "llvm/Type.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
@@ -803,6 +804,30 @@
return TargetLowering::getConstraintType(Constraint);
}
+/// Examine constraint type and operand type and determine a weight value.
+/// This object must already have been set up with the operand type
+/// and the current alternative constraint selected.
+TargetLowering::ConstraintWeight
+AlphaTargetLowering::getSingleConstraintMatchWeight(
+ AsmOperandInfo &info, const char *constraint) const {
+ ConstraintWeight weight = CW_Invalid;
+ Value *CallOperandVal = info.CallOperandVal;
+ // If we don't have a value, we can't do a match,
+ // but allow it at the lowest weight.
+ if (CallOperandVal == NULL)
+ return CW_Default;
+ // Look at the constraint type.
+ switch (*constraint) {
+ default:
+ weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
+ break;
+ case 'f':
+ weight = CW_Register;
+ break;
+ }
+ return weight;
+}
+
std::vector<unsigned> AlphaTargetLowering::
getRegClassForInlineAsmConstraint(const std::string &Constraint,
EVT VT) const {