[PATCH] D19592: [X86]: Quit promoting 16 bit loads to 32 bit.

[Kevin B. Smith via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL267773: [X86]: Quit promoting 16 bit loads to 32 bit. (authored by kbsmith1).

Changed prior to commit:
  http://reviews.llvm.org/D19592?vs=55214&id=55300#toc

Repository:
  rL LLVM

http://reviews.llvm.org/D19592

Files:
  llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
  llvm/trunk/test/CodeGen/X86/half.ll

Index: llvm/trunk/test/CodeGen/X86/half.ll
===================================================================
--- llvm/trunk/test/CodeGen/X86/half.ll
+++ llvm/trunk/test/CodeGen/X86/half.ll
@@ -19,7 +19,8 @@
 
 define i16 @test_bitcast_from_half(half* %addr) {
 ; CHECK-LABEL: test_bitcast_from_half:
-; CHECK: movzwl (%rdi), %eax
+; BWON:  movzwl (%rdi), %eax
+; BWOFF: movw (%rdi), %ax
   %val = load half, half* %addr
   %val_int = bitcast half %val to i16
   ret i16 %val_int
Index: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
@@ -29639,23 +29639,6 @@
   bool Commute = false;
   switch (Op.getOpcode()) {
   default: break;
-  case ISD::LOAD: {
-    LoadSDNode *LD = cast<LoadSDNode>(Op);
-    // If the non-extending load has a single use and it's not live out, then it
-    // might be folded.
-    if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
-                                                     Op.hasOneUse()*/) {
-      for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
-             UE = Op.getNode()->use_end(); UI != UE; ++UI) {
-        // The only case where we'd want to promote LOAD (rather then it being
-        // promoted as an operand is when it's only use is liveout.
-        if (UI->getOpcode() != ISD::CopyToReg)
-          return false;
-      }
-    }
-    Promote = true;
-    break;
-  }
   case ISD::SIGN_EXTEND:
   case ISD::ZERO_EXTEND:
   case ISD::ANY_EXTEND:


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