R600/SI: Clean up checks for legality of immediate operands

There are new register classes VCSrc_* which represent operands that
can take an SGPR, VGPR or inline constant.  The VSrc_* class is now used
to represent operands that can take an SGPR, VGPR, or a 32-bit
immediate.

This allows us to have more accurate checks for legality of
immediates, since before we had no way to distinguish between operands
that supported any 32-bit immediate and operands which could only
support inline constants.

llvm-svn: 218334

1 files changed, 21 insertions, 3 deletions

diff --git a/llvm/lib/Target/R600/SIRegisterInfo.cpp b/llvm/lib/Target/R600/SIRegisterInfo.cpp
index d1666fdd1f6..3924e21003c 100644
--- a/llvm/lib/Target/R600/SIRegisterInfo.cpp
+++ b/llvm/lib/Target/R600/SIRegisterInfo.cpp
@@ -275,7 +275,7 @@ unsigned SIRegisterInfo::getPhysRegSubReg(unsigned Reg,
   return SubRC->getRegister(Index + Channel);
 }
 
-bool SIRegisterInfo::regClassCanUseImmediate(int RCID) const {
+bool SIRegisterInfo::regClassCanUseLiteralConstant(int RCID) const {
   switch (RCID) {
   default: return false;
   case AMDGPU::SSrc_32RegClassID:
@@ -286,11 +286,29 @@ bool SIRegisterInfo::regClassCanUseImmediate(int RCID) const {
   }
 }
 
-bool SIRegisterInfo::regClassCanUseImmediate(
+bool SIRegisterInfo::regClassCanUseLiteralConstant(
                              const TargetRegisterClass *RC) const {
-  return regClassCanUseImmediate(RC->getID());
+  return regClassCanUseLiteralConstant(RC->getID());
 }
 
+bool SIRegisterInfo::regClassCanUseInlineConstant(int RCID) const {
+  if (regClassCanUseLiteralConstant(RCID))
+    return true;
+
+  switch (RCID) {
+  default: return false;
+  case AMDGPU::VCSrc_32RegClassID:
+  case AMDGPU::VCSrc_64RegClassID:
+    return true;
+  }
+}
+
+bool SIRegisterInfo::regClassCanUseInlineConstant(
+                            const TargetRegisterClass *RC) const {
+  return regClassCanUseInlineConstant(RC->getID());
+}
+
+
 unsigned SIRegisterInfo::getPreloadedValue(const MachineFunction &MF,
                                            enum PreloadedValue Value) const {