R600: rework handling of the constants

Remove Cxxx registers, add new special register - "ALU_CONST" and new
operand for each alu src - "sel". ALU_CONST is used to designate that the
new operand contains the value to override src.sel, src.kc_bank, src.chan
for constants in the driver.

Patch by: Vadim Girlin

Vincent Lejeune:
  - Use pointers for constants
  - Fold CONST_ADDRESS when possible

Tom Stellard:
  - Give CONSTANT_BUFFER_0 its own address space
  - Use integer types for constant loads

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 173222

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/Target/R600/AMDGPUTargetMachine.cpp b/llvm/lib/Target/R600/AMDGPUTargetMachine.cpp
index 26ac928347d..7b069e77604 100644
--- a/llvm/lib/Target/R600/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/R600/AMDGPUTargetMachine.cpp
@@ -136,6 +136,7 @@ bool AMDGPUPassConfig::addPreEmitPass() {
     addPass(createAMDGPUCFGPreparationPass(*TM));
     addPass(createAMDGPUCFGStructurizerPass(*TM));
     addPass(createR600ExpandSpecialInstrsPass(*TM));
+    addPass(createR600LowerConstCopy(*TM));
     addPass(&FinalizeMachineBundlesID);
   } else {
     addPass(createSILowerLiteralConstantsPass(*TM));