[llvm] r244395 - Add SlowBTMem to Sandy Bridge and newer Intel CPUs. Reading through Agner Fog's table suggests there have been no improvements to these processors relative to Westmere for bit test instructions.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sat Aug  8 02:20:04 2015
New Revision: 244395

URL: http://llvm.org/viewvc/llvm-project?rev=244395&view=rev
Log:
Add SlowBTMem to Sandy Bridge and newer Intel CPUs. Reading through Agner Fog's table suggests there have been no improvements to these processors relative to Westmere for bit test instructions.

Modified:
    llvm/trunk/lib/Target/X86/X86.td

Modified: llvm/trunk/lib/Target/X86/X86.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86.td?rev=244395&r1=244394&r2=244395&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86.td (original)
+++ llvm/trunk/lib/Target/X86/X86.td Sat Aug  8 02:20:04 2015
@@ -307,6 +307,7 @@ def : WestmereProc<"westmere">;
 class SandyBridgeProc<string Name> : ProcessorModel<Name, SandyBridgeModel, [
                                        FeatureAVX,
                                        FeatureCMPXCHG16B,
+                                       FeatureSlowBTMem,
                                        FeatureFastUAMem,
                                        FeatureSlowUAMem32,
                                        FeaturePOPCNT,
@@ -319,6 +320,7 @@ def : SandyBridgeProc<"corei7-avx">; //
 class IvyBridgeProc<string Name> : ProcessorModel<Name, SandyBridgeModel, [
                                      FeatureAVX,
                                      FeatureCMPXCHG16B,
+                                     FeatureSlowBTMem,
                                      FeatureFastUAMem,
                                      FeatureSlowUAMem32,
                                      FeaturePOPCNT,
@@ -334,6 +336,7 @@ def : IvyBridgeProc<"core-avx-i">; // Le
 class HaswellProc<string Name> : ProcessorModel<Name, HaswellModel, [
                                    FeatureAVX2,
                                    FeatureCMPXCHG16B,
+                                   FeatureSlowBTMem,
                                    FeatureFastUAMem,
                                    FeaturePOPCNT,
                                    FeatureAES,
@@ -356,6 +359,7 @@ def : HaswellProc<"core-avx2">; // Legac
 class BroadwellProc<string Name> : ProcessorModel<Name, HaswellModel, [
                                      FeatureAVX2,
                                      FeatureCMPXCHG16B,
+                                     FeatureSlowBTMem,
                                      FeatureFastUAMem,
                                      FeaturePOPCNT,
                                      FeatureAES,
@@ -390,11 +394,11 @@ def : KnightsLandingProc<"knl">;
 class SkylakeProc<string Name> : ProcessorModel<Name, HaswellModel,
                      [FeatureAVX512, FeatureCDI,
                       FeatureDQI, FeatureBWI, FeatureVLX,
-                      FeatureCMPXCHG16B, FeatureFastUAMem, FeaturePOPCNT,
-                      FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
-                      FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
-                      FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
-                      FeatureSlowIncDec, FeatureMPX]>;
+                      FeatureCMPXCHG16B, FeatureSlowBTMem, FeatureFastUAMem,
+                      FeaturePOPCNT, FeatureAES, FeaturePCLMUL, FeatureRDRAND,
+                      FeatureF16C, FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT,
+                      FeatureBMI, FeatureBMI2, FeatureFMA, FeatureRTM,
+                      FeatureHLE, FeatureSlowIncDec, FeatureMPX]>;
 def : SkylakeProc<"skylake">;
 def : SkylakeProc<"skx">; // Legacy alias.