From c2e081030e5c6f96ea3eb9948e5c0d0d2ed79a3d Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Wed, 9 May 2012 11:44:27 -0400
Subject: [PATCH] radeon/llvm: Don't rely on tablegen for lowering
 int_AMDGPU_load_const

---
 .../drivers/radeon/AMDGPUGenShaderPatterns.pl | 30 -------------------
 src/gallium/drivers/radeon/Makefile           |  3 --
 src/gallium/drivers/radeon/Makefile.sources   |  1 -
 .../drivers/radeon/R600ISelLowering.cpp       | 14 ++++++++-
 .../drivers/radeon/R600Instructions.td        | 10 +++++--
 5 files changed, 20 insertions(+), 38 deletions(-)
 delete mode 100644 src/gallium/drivers/radeon/AMDGPUGenShaderPatterns.pl

diff --git a/src/gallium/drivers/radeon/AMDGPUGenShaderPatterns.pl b/src/gallium/drivers/radeon/AMDGPUGenShaderPatterns.pl
deleted file mode 100644
index 60523a7b48f..00000000000
--- a/src/gallium/drivers/radeon/AMDGPUGenShaderPatterns.pl
+++ /dev/null
@@ -1,30 +0,0 @@
-#===-- AMDGPUGenShaderPatterns.pl - TODO: Add brief description -------===#
-#
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source
-# License. See LICENSE.TXT for details.
-#
-#===----------------------------------------------------------------------===#
-#
-# TODO: Add full description
-#
-#===----------------------------------------------------------------------===#
-
-use strict;
-use warnings;
-
-use AMDGPUConstants;
-
-my $reg_prefix = $ARGV[0];
-
-for (my $i = 0; $i < CONST_REG_COUNT * 4; $i++) {
-  my $index = get_hw_index($i);
-  my $chan = get_chan_str($i);
-print <<STRING;
-def : Pat <
-  (int_AMDGPU_load_const $i),
-  (f32 (MOV (f32 $reg_prefix$index\_$chan)))
->;
-STRING
-}
diff --git a/src/gallium/drivers/radeon/Makefile b/src/gallium/drivers/radeon/Makefile
index 13aa3605dcd..cc409645a6e 100644
--- a/src/gallium/drivers/radeon/Makefile
+++ b/src/gallium/drivers/radeon/Makefile
@@ -35,9 +35,6 @@ else
 	cp R600IntrinsicsOpenCL.td R600Intrinsics.td
 endif
 
-R600ShaderPatterns.td: AMDGPUGenShaderPatterns.pl
-	$(PERL) $^ C > $@
-	
 R600RegisterInfo.td: R600GenRegisterInfo.pl
 	$(PERL) $^ > $@
 
diff --git a/src/gallium/drivers/radeon/Makefile.sources b/src/gallium/drivers/radeon/Makefile.sources
index ae63dfa2461..8c302e160d4 100644
--- a/src/gallium/drivers/radeon/Makefile.sources
+++ b/src/gallium/drivers/radeon/Makefile.sources
@@ -1,7 +1,6 @@
 
 GENERATED_SOURCES := \
 	R600Intrinsics.td		\
-	R600ShaderPatterns.td		\
 	R600RegisterInfo.td		\
 	AMDGPUInstrEnums.td		\
 	SIRegisterInfo.td		\
diff --git a/src/gallium/drivers/radeon/R600ISelLowering.cpp b/src/gallium/drivers/radeon/R600ISelLowering.cpp
index bee59cc0d7b..52e2bd8d3f3 100644
--- a/src/gallium/drivers/radeon/R600ISelLowering.cpp
+++ b/src/gallium/drivers/radeon/R600ISelLowering.cpp
@@ -40,6 +40,7 @@ MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
 {
   MachineFunction * MF = BB->getParent();
   MachineRegisterInfo &MRI = MF->getRegInfo();
+  MachineBasicBlock::iterator I = *MI;
 
   switch (MI->getOpcode()) {
   default: return AMDGPUTargetLowering::EmitInstrWithCustomInserter(MI, BB);
@@ -89,6 +90,18 @@ MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
   case AMDIL::LOCAL_SIZE_Z:
     lowerImplicitParameter(MI, *BB, MRI, 8);
     break;
+
+  case AMDIL::R600_LOAD_CONST:
+    {
+      int64_t RegIndex = MI->getOperand(1).getImm();
+      unsigned ConstantReg = AMDIL::R600_CReg32RegClass.getRegister(RegIndex);
+      BuildMI(*BB, I, BB->findDebugLoc(I), TII->get(AMDIL::COPY))
+                  .addOperand(MI->getOperand(0))
+                  .addReg(ConstantReg);
+      MI->eraseFromParent();
+      break;
+    }
+
   case AMDIL::LOAD_INPUT:
     {
       int64_t RegIndex = MI->getOperand(1).getImm();
@@ -99,7 +112,6 @@ MachineBasicBlock * R600TargetLowering::EmitInstrWithCustomInserter(
     }
   case AMDIL::STORE_OUTPUT:
     {
-      MachineBasicBlock::iterator I = *MI;
       int64_t OutputIndex = MI->getOperand(1).getImm();
       unsigned OutputReg = AMDIL::R600_TReg32RegClass.getRegister(OutputIndex);
 
diff --git a/src/gallium/drivers/radeon/R600Instructions.td b/src/gallium/drivers/radeon/R600Instructions.td
index fce5f90b66f..e3ed7c2d46a 100644
--- a/src/gallium/drivers/radeon/R600Instructions.td
+++ b/src/gallium/drivers/radeon/R600Instructions.td
@@ -991,6 +991,13 @@ def LOCAL_SIZE_Y : R600PreloadInst <"LOCAL_SIZE_Y",
 def LOCAL_SIZE_Z : R600PreloadInst <"LOCAL_SIZE_Z",
                                     int_r600_read_local_size_z>;
 
+def R600_LOAD_CONST : AMDGPUShaderInst <
+  (outs R600_Reg32:$dst),
+  (ins i32imm:$src0),
+  "R600_LOAD_CONST $dst, $src0",
+  [(set R600_Reg32:$dst, (int_AMDGPU_load_const imm:$src0))]
+>;
+
 def LOAD_INPUT : AMDGPUShaderInst <
   (outs R600_Reg32:$dst),
   (ins i32imm:$src),
@@ -1050,7 +1057,4 @@ def : Insert_Element <i32, v4i32, R600_Reg32, R600_Reg128, 5, sel_y>;
 def : Insert_Element <i32, v4i32, R600_Reg32, R600_Reg128, 6, sel_z>;
 def : Insert_Element <i32, v4i32, R600_Reg32, R600_Reg128, 7, sel_w>;
 
-
-include "R600ShaderPatterns.td"
-
 } // End isR600toCayman Predicate
-- 
2.30.2