[llvm] r221296 - [X86] Add 'FeatureSlowSHLD' to cpu 'bdver3'. Also explicit set FeatureAVX and FeatureSSE4A for all the bdver* cpus.

[Andrea Di Biagio]

Author: adibiagio
Date: Tue Nov  4 15:18:09 2014
New Revision: 221296

URL: http://llvm.org/viewvc/llvm-project?rev=221296&view=rev
Log:
[X86] Add 'FeatureSlowSHLD' to cpu 'bdver3'. Also explicit set FeatureAVX and FeatureSSE4A for all the bdver* cpus.

This patch adds 'FeatureSlowSHLD' to 'bdver3'.
According to the official AMD optimization guide for amdfam15: "Using
alternative code in place of SHLD achieves lower overall latency and
requires fewer execution resources. The 32-bit and 64-bit forms of
ADD, ADC, SHR, and LEA (except 16-bit form) are DirectPath
instructions, while SHLD is a VectorPath instruction."

This patch also explicitly sets feature AVX and SSE4A for all the bdver*
cpus. This part of the patch is a non-functional change and it is mainly
done for clarity reasons (Both XOP and FMA4 already imply AVX and SSE4A).

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=221296&r1=221295&r2=221296&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86.td (original)
+++ llvm/trunk/lib/Target/X86/X86.td Tue Nov  4 15:18:09 2014
@@ -355,27 +355,30 @@ def : ProcessorModel<"btver2", BtVer2Mod
 // Bulldozer
 def : Proc<"bdver1",          [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
                                FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
-                               FeatureLZCNT, FeaturePOPCNT, FeatureSlowSHLD]>;
+                               FeatureAVX, FeatureSSE4A, FeatureLZCNT,
+                               FeaturePOPCNT, FeatureSlowSHLD]>;
 // Piledriver
 def : Proc<"bdver2",          [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
                                FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
-                               FeatureF16C, FeatureLZCNT,
-                               FeaturePOPCNT, FeatureBMI, FeatureTBM,
-                               FeatureFMA, FeatureSlowSHLD]>;
+                               FeatureAVX, FeatureSSE4A, FeatureF16C,
+                               FeatureLZCNT, FeaturePOPCNT, FeatureBMI,
+                               FeatureTBM, FeatureFMA, FeatureSlowSHLD]>;
 
 // Steamroller
 def : Proc<"bdver3",          [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
                                FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
-                               FeatureF16C, FeatureLZCNT,
-                               FeaturePOPCNT, FeatureBMI,  FeatureTBM,
-                               FeatureFMA, FeatureFSGSBase]>;
+                               FeatureAVX, FeatureSSE4A, FeatureF16C,
+                               FeatureLZCNT, FeaturePOPCNT, FeatureBMI,
+                               FeatureTBM, FeatureFMA, FeatureSlowSHLD,
+                               FeatureFSGSBase]>;
 
 // Excavator
 def : Proc<"bdver4",          [FeatureAVX2, FeatureXOP, FeatureFMA4,
                                FeatureCMPXCHG16B, FeatureAES, FeaturePRFCHW,
                                FeaturePCLMUL, FeatureF16C, FeatureLZCNT,
                                FeaturePOPCNT, FeatureBMI, FeatureBMI2,
-                               FeatureTBM, FeatureFMA, FeatureFSGSBase]>;
+                               FeatureTBM, FeatureFMA, FeatureSSE4A,
+                               FeatureFSGSBase]>;
 
 def : Proc<"geode",           [Feature3DNowA]>;