commit 6557bce3ec8d5a82b2ea299a18cb51677b299633
author Evan Cheng <evan.cheng@apple.com> Tue Feb 22 19:53:14 2011 +0000
committer Evan Cheng <evan.cheng@apple.com> Tue Feb 22 19:53:14 2011 +0000
tree 8cb296c4fb21b11e13d819b58b36f2c4cd7cd655
parent 50d280c14ee1c25fc8e6cb6f59af44f754edce42

VFP single precision arith instructions can go down to NEON pipeline, but on Cortex-A8 only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126238 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/NEONMoveFix.cpp

diff --git a/lib/Target/ARM/NEONMoveFix.cpp b/lib/Target/ARM/NEONMoveFix.cpp
index 97e54bf..e8393c5 100644
--- a/lib/Target/ARM/NEONMoveFix.cpp
+++ b/lib/Target/ARM/NEONMoveFix.cpp
@@ -35,6 +35,7 @@
   private:
     const TargetRegisterInfo *TRI;
     const ARMBaseInstrInfo *TII;
+    bool isA8;
 
     typedef DenseMap<unsigned, const MachineInstr*> RegMap;
 
@@ -43,6 +44,16 @@
   char NEONMoveFixPass::ID = 0;
 }
 
+static bool inNEONDomain(unsigned Domain, bool isA8) {
+  if (Domain & ARMII::DomainNEON) {
+    // Some instructions only go down NEON pipeline when executed on CortexA8.
+    if (Domain & ARMII::DomainNEONA8)
+      return isA8;
+    return true;
+  }
+  return false;
+}
+
 bool NEONMoveFixPass::InsertMoves(MachineBasicBlock &MBB) {
   RegMap Defs;
   bool Modified = false;
@@ -70,7 +81,7 @@
           Domain = ARMII::DomainNEON;
       }
 
-      if (Domain & ARMII::DomainNEON) {
+      if (inNEONDomain(Domain, isA8)) {
         // Convert VMOVD to VMOVDneon
         unsigned DestReg = MI->getOperand(0).getReg();
 
@@ -123,6 +134,7 @@
 
   TRI = TM.getRegisterInfo();
   TII = static_cast<const ARMBaseInstrInfo*>(TM.getInstrInfo());
+  isA8 = TM.getSubtarget<ARMSubtarget>().isCortexA8();
 
   bool Modified = false;
   for (MachineFunction::iterator MFI = Fn.begin(), E = Fn.end(); MFI != E;