[llvm-commits] [llvm] r109450 - in /llvm/trunk/lib/Target/X86: X86ISelLowering.cpp X86ISelLowering.h

[Evan Cheng]

Author: evancheng
Date: Mon Jul 26 16:50:05 2010
New Revision: 109450

URL: http://llvm.org/viewvc/llvm-project?rev=109450&view=rev
Log:
On x86, f32 / f64 nodes share the same registers as 128-bit vector values.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
    llvm/trunk/lib/Target/X86/X86ISelLowering.h

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=109450&r1=109449&r2=109450&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Jul 26 16:50:05 2010
@@ -1190,6 +1190,32 @@
   return F->hasFnAttr(Attribute::OptimizeForSize) ? 0 : 4;
 }
 
+std::pair<const TargetRegisterClass*, uint8_t>
+X86TargetLowering::findRepresentativeClass(EVT VT) const{
+  const TargetRegisterClass *RRC = 0;
+  uint8_t Cost = 1;
+  switch (VT.getSimpleVT().SimpleTy) {
+  default:
+    return TargetLowering::findRepresentativeClass(VT);
+  case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
+    RRC = (Subtarget->is64Bit()
+           ? X86::GR64RegisterClass : X86::GR32RegisterClass);
+    break;
+  case MVT::v8i8: case MVT::v4i16:
+  case MVT::v2i32: case MVT::v1i64: 
+    RRC = X86::VR64RegisterClass;
+    break;
+  case MVT::f32: case MVT::f64:
+  case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
+  case MVT::v4f32: case MVT::v2f64:
+  case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
+  case MVT::v4f64:
+    RRC = X86::VR128RegisterClass;
+    break;
+  }
+  return std::make_pair(RRC, Cost);
+}
+
 unsigned
 X86TargetLowering::getRegPressureLimit(const TargetRegisterClass *RC,
                                        MachineFunction &MF) const {

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.h?rev=109450&r1=109449&r2=109450&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.h (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.h Mon Jul 26 16:50:05 2010
@@ -599,6 +599,10 @@
     /// appropriate.
     virtual bool getStackCookieLocation(unsigned &AddressSpace, unsigned &Offset) const;
 
+  protected:
+    std::pair<const TargetRegisterClass*, uint8_t>
+    findRepresentativeClass(EVT VT) const;
+
   private:
     /// Subtarget - Keep a pointer to the X86Subtarget around so that we can
     /// make the right decision when generating code for different targets.