[llvm] b35d0a6 - [AMDGPU] Add switch to enable architected SGPRs.

[Christudasan Devadasan via llvm-commits]

Author: Christudasan Devadasan
Date: 2023-02-13T22:10:54+05:30
New Revision: b35d0a6834f8d648ef03a15fba43847b99863a60

URL: https://github.com/llvm/llvm-project/commit/b35d0a6834f8d648ef03a15fba43847b99863a60
DIFF: https://github.com/llvm/llvm-project/commit/b35d0a6834f8d648ef03a15fba43847b99863a60.diff

LOG: [AMDGPU] Add switch to enable architected SGPRs.

Reviewed By: rampitec, foad

Differential Revision: https://reviews.llvm.org/D143706

Added: 
    

Modified: 
    llvm/lib/Target/AMDGPU/AMDGPU.td
    llvm/lib/Target/AMDGPU/GCNSubtarget.h

Removed: 
    


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diff  --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index 9cc1a4c84a799..b8eb57169cee9 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -866,6 +866,12 @@ def FeatureArchitectedFlatScratch : SubtargetFeature<"architected-flat-scratch",
   "Flat Scratch register is a readonly SPI initialized architected register"
 >;
 
+def FeatureArchitectedSGPRs : SubtargetFeature<"architected-sgprs",
+  "HasArchitectedSGPRs",
+  "true",
+  "Enable the architected SGPRs"
+>;
+
 // Dummy feature used to disable assembler instructions.
 def FeatureDisable : SubtargetFeature<"",
   "FeatureDisable","true",

diff  --git a/llvm/lib/Target/AMDGPU/GCNSubtarget.h b/llvm/lib/Target/AMDGPU/GCNSubtarget.h
index 4177a8307ad8e..cb712b205e166 100644
--- a/llvm/lib/Target/AMDGPU/GCNSubtarget.h
+++ b/llvm/lib/Target/AMDGPU/GCNSubtarget.h
@@ -175,6 +175,7 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
   bool ScalarFlatScratchInsts = false;
   bool HasArchitectedFlatScratch = false;
   bool EnableFlatScratch = false;
+  bool HasArchitectedSGPRs = false;
   bool AddNoCarryInsts = false;
   bool HasUnpackedD16VMem = false;
   bool LDSMisalignedBug = false;
@@ -1132,6 +1133,9 @@ class GCNSubtarget final : public AMDGPUGenSubtargetInfo,
   /// In this case it is readonly.
   bool flatScratchIsArchitected() const { return HasArchitectedFlatScratch; }
 
+  /// \returns true if the architected SGPRs are enabled.
+  bool hasArchitectedSGPRs() const { return HasArchitectedSGPRs; }
+
   /// \returns true if the machine has merged shaders in which s0-s7 are
   /// reserved by the hardware and user SGPRs start at s8
   bool hasMergedShaders() const {