[AMDGPU] Eliminate InstCombineTables.td. NFC. (#170857)

This also eliminates the generated file InstCombineTables.inc which was
99% identical to the existing AMDGPUGenSearchableTables.inc.

Author: jayfoad

llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp

@@ -35,7 +35,7 @@ struct AMDGPUImageDMaskIntrinsic {
 };
 
 #define GET_AMDGPUImageDMaskIntrinsicTable_IMPL
-#include "InstCombineTables.inc"
+#include "AMDGPUGenSearchableTables.inc"
 
 } // end anonymous namespace
 

llvm/lib/Target/AMDGPU/AMDGPUSearchableTables.td

@@ -413,3 +413,12 @@ def : AlwaysUniform<int_amdgcn_s_getpc>;
 def : AlwaysUniform<int_amdgcn_s_getreg>;
 def : AlwaysUniform<int_amdgcn_s_memrealtime>;
 def : AlwaysUniform<int_amdgcn_s_memtime>;
+
+def AMDGPUImageDMaskIntrinsicTable : GenericTable {
+  let FilterClass = "AMDGPUImageDMaskIntrinsic";
+  let Fields = ["Intr"];
+
+  let PrimaryKey = ["Intr"];
+  let PrimaryKeyName = "getAMDGPUImageDMaskIntrinsic";
+  let PrimaryKeyEarlyOut = 1;
+}

llvm/lib/Target/AMDGPU/CMakeLists.txt

@@ -40,10 +40,6 @@ tablegen(LLVM R600GenSubtargetInfo.inc -gen-subtarget)
 
 add_public_tablegen_target(AMDGPUCommonTableGen)
 
-set(LLVM_TARGET_DEFINITIONS InstCombineTables.td)
-tablegen(LLVM InstCombineTables.inc -gen-searchable-tables)
-add_public_tablegen_target(InstCombineTableGen)
-
 add_llvm_target(AMDGPUCodeGen
   AMDGPUAliasAnalysis.cpp
   AMDGPUAlwaysInlinePass.cpp

llvm/lib/Target/AMDGPU/InstCombineTables.td

@@ -75,11 +75,6 @@ tablegen("AMDGPUGenSDNodeInfo") {
   td_file = "AMDGPU.td"
 }
 
-tablegen("InstCombineTables") {
-  visibility = [ ":LLVMAMDGPUCodeGen" ]
-  args = [ "-gen-searchable-tables" ]
-}
-
 tablegen("R600GenCallingConv") {
   visibility = [ ":LLVMAMDGPUCodeGen" ]
   args = [ "-gen-callingconv" ]
@@ -110,7 +105,6 @@ static_library("LLVMAMDGPUCodeGen") {
     ":AMDGPUGenRegBankGICombiner",
     ":AMDGPUGenRegisterBank",
     ":AMDGPUGenSDNodeInfo",
-    ":InstCombineTables",
     ":R600GenCallingConv",
     ":R600GenDAGISel",
     ":R600GenDFAPacketizer",