Inline asm multiple alternative constraints development phase 2 - improved basic logic, added initial platform support.
llvm-svn: 117667
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.cpp b/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
index efd0d2c..9ae06ea 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/llvm/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 {
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.h b/llvm/lib/Target/Alpha/AlphaISelLowering.h
index 46e0c7d..b429e9f 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.h
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.h
@@ -87,6 +87,11 @@
ConstraintType getConstraintType(const std::string &Constraint) const;
+ /// Examine constraint string and operand type and determine a weight value.
+ /// The operand object must already have been set up with the operand type.
+ ConstraintWeight getSingleConstraintMatchWeight(
+ AsmOperandInfo &info, const char *constraint) const;
+
std::vector<unsigned>
getRegClassForInlineAsmConstraint(const std::string &Constraint,
EVT VT) const;