[SPARC] Revamp AnalyzeBranch and add ReverseBranchCondition.

[oota-llvm.git] / lib / Target / Sparc / SparcCallingConv.td

diff --git a/lib/Target/Sparc/SparcCallingConv.td b/lib/Target/Sparc/SparcCallingConv.td
index 181165d6ddd47a7415c69d50e18ac6023de2b760..0aa29d186dc1829e13ef665f985b8fbb163c6d52 100644 (file)
--- a/lib/Target/Sparc/SparcCallingConv.td
+++ b/lib/Target/Sparc/SparcCallingConv.td
@@ -21,7 +21,11 @@ def CC_Sparc32 : CallingConv<[
   // i32 f32 arguments get passed in integer registers if there is space.
   CCIfType<[i32, f32], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
   // f64 arguments are split and passed through registers or through stack.
-  CCIfType<[f64], CCCustom<"CC_Sparc_Assign_f64">>,
+  CCIfType<[f64], CCCustom<"CC_Sparc_Assign_Split_64">>,
+  // As are v2i32 arguments (this would be the default behavior for
+  // v2i32 if it wasn't allocated to the IntPair register-class)
+  CCIfType<[v2i32], CCCustom<"CC_Sparc_Assign_Split_64">>,
+
 
   // Alternatively, they are assigned to the stack in 4-byte aligned units.
   CCAssignToStack<4, 4>
@@ -30,7 +34,8 @@ def CC_Sparc32 : CallingConv<[
 def RetCC_Sparc32 : CallingConv<[
   CCIfType<[i32], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
   CCIfType<[f32], CCAssignToReg<[F0, F1, F2, F3]>>,
-  CCIfType<[f64], CCAssignToReg<[D0, D1]>>
+  CCIfType<[f64], CCAssignToReg<[D0, D1]>>,
+  CCIfType<[v2i32], CCCustom<"CC_Sparc_Assign_Ret_Split_64">>
 ]>;
 
 
@@ -103,7 +108,7 @@ def RetCC_Sparc32 : CallingConv<[
 // Function return values are passed exactly like function arguments, except a
 // struct up to 32 bytes in size can be returned in registers.
 
-// Function arguments AND return values.
+// Function arguments AND most return values.
 def CC_Sparc64 : CallingConv<[
   // The frontend uses the inreg flag to indicate i32 and float arguments from
   // structs. These arguments are not promoted to 64 bits, but they can still
@@ -118,8 +123,22 @@ def CC_Sparc64 : CallingConv<[
   CCCustom<"CC_Sparc64_Full">
 ]>;
 
+def RetCC_Sparc64 : CallingConv<[
+  // A single f32 return value always goes in %f0. The ABI doesn't specify what
+  // happens to multiple f32 return values outside a struct.
+  CCIfType<[f32], CCCustom<"CC_Sparc64_Half">>,
+
+  // Otherwise, return values are passed exactly like arguments.
+  CCDelegateTo<CC_Sparc64>
+]>;
+
 // Callee-saved registers are handled by the register window mechanism.
 def CSR : CalleeSavedRegs<(add)> {
   let OtherPreserved = (add (sequence "I%u", 0, 7),
                             (sequence "L%u", 0, 7));
 }
+
+// Callee-saved registers for calls with ReturnsTwice attribute.
+def RTCSR : CalleeSavedRegs<(add)> {
+  let OtherPreserved = (add I6, I7);
+}