R600: improve inputs/interpolation handling

Use one intrinsic for all sorts of interpolation.
Use two separate unexpanded instructions to represent INTERP_XY and _ZW -
this will allow to eliminate one part if it's not used.
Track liveness of special interpolation regs instead of reserving them -
this will allow to reuse those regs, lowering reg pressure.

Patch By: Vadim Girlin

v2[Vincent Lejeune]: Rebased against current llvm master

Signed-off-by: Vadim Girlin <vadimgirlin@gmail.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174394 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 6 deletions

diff --git a/lib/Target/R600/R600RegisterInfo.cpp b/lib/Target/R600/R600RegisterInfo.cpp
index 0441e4a306..d46b3a3543 100644
--- a/lib/Target/R600/R600RegisterInfo.cpp
+++ b/lib/Target/R600/R600RegisterInfo.cpp
@@ -28,7 +28,6 @@ R600RegisterInfo::R600RegisterInfo(AMDGPUTargetMachine &tm,
 
 BitVector R600RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
   BitVector Reserved(getNumRegs());
-  const R600MachineFunctionInfo * MFI = MF.getInfo<R600MachineFunctionInfo>();
 
   Reserved.set(AMDGPU::ZERO);
   Reserved.set(AMDGPU::HALF);
@@ -44,11 +43,6 @@ BitVector R600RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
   Reserved.set(AMDGPU::PRED_SEL_ZERO);
   Reserved.set(AMDGPU::PRED_SEL_ONE);
 
-  for (std::vector<unsigned>::const_iterator I = MFI->ReservedRegs.begin(),
-                                    E = MFI->ReservedRegs.end(); I != E; ++I) {
-    Reserved.set(*I);
-  }
-
   return Reserved;
 }