Don't attempt to create VZEXT_LOAD out of an extload. This an issue where the
code generator would do something like this:
f64 = load f32 <anyext>, f32mem
v2f64 = insertelt undef, %0, 0
v2f64 = insertelt %1, 0.0, 1
into
v2f64 = vzext_load f32mem
which on x86 is movsd, when you really wanted a cvtss2sd/movsd pair.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51624 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 2a9cef1..5343971 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -6324,6 +6324,11 @@
// Transform it into VZEXT_LOAD addr.
LoadSDNode *LD = cast<LoadSDNode>(Base);
+
+ // Load must not be an extload.
+ if (LD->getExtensionType() != ISD::NON_EXTLOAD)
+ return SDOperand();
+
return DAG.getNode(X86ISD::VZEXT_LOAD, VT, LD->getChain(), LD->getBasePtr());
}