implement a ArgumentLayout class to factor code common to LowerFORMAL_ARGUMENTS and LowerCALL
implement FMDRR
add support for f64 function arguments

llvm-svn: 30754
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.td b/llvm/lib/Target/ARM/ARMInstrInfo.td
index 55128de..cf08487 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.td
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.td
@@ -80,6 +80,9 @@
 def SDTarmfmrrd    : SDTypeProfile<0, 3, [SDTCisInt<0>, SDTCisInt<1>, SDTCisFP<2>]>;
 def armfmrrd       : SDNode<"ARMISD::FMRRD", SDTarmfmrrd, [SDNPHasChain, SDNPOutFlag]>;
 
+def SDTarmfmdrr    : SDTypeProfile<1, 2, [SDTCisFP<0>, SDTCisInt<1>, SDTCisInt<2>]>;
+def armfmdrr       : SDNode<"ARMISD::FMDRR", SDTarmfmdrr, []>;
+
 def ADJCALLSTACKUP : InstARM<(ops i32imm:$amt),
                             "!ADJCALLSTACKUP $amt",
                             [(callseq_end imm:$amt)]>;
@@ -175,6 +178,9 @@
 def FMRRD   : InstARM<(ops IntRegs:$i0, IntRegs:$i1, DFPRegs:$src),
                        "fmrrd $i0, $i1, $src", [(armfmrrd IntRegs:$i0, IntRegs:$i1, DFPRegs:$src)]>;
 
+def FMDRR   : InstARM<(ops DFPRegs:$dst, IntRegs:$i0, IntRegs:$i1),
+                       "fmdrr $dst, $i0, $i1", [(set DFPRegs:$dst, (armfmdrr IntRegs:$i0, IntRegs:$i1))]>;
+
 def FSITOS  : InstARM<(ops FPRegs:$dst, FPRegs:$src),
                        "fsitos $dst, $src", [(set FPRegs:$dst, (armfsitos FPRegs:$src))]>;