[llvm-commits] [llvm] r117940 - in /llvm/trunk: lib/Target/ARM/ARMISelLowering.cpp test/CodeGen/ARM/vmov.ll

[Bob Wilson]

Author: bwilson
Date: Mon Nov  1 13:31:39 2010
New Revision: 117940

URL: http://llvm.org/viewvc/llvm-project?rev=117940&view=rev
Log:
NEON does not support truncating vector stores.  Radar 8598391.

Modified:
    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
    llvm/trunk/test/CodeGen/ARM/vmov.ll

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=117940&r1=117939&r2=117940&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Mon Nov  1 13:31:39 2010
@@ -104,6 +104,10 @@
     setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
     setLoadExtAction(ISD::SEXTLOAD, VT.getSimpleVT(), Expand);
     setLoadExtAction(ISD::ZEXTLOAD, VT.getSimpleVT(), Expand);
+    for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
+         InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
+      setTruncStoreAction(VT.getSimpleVT(),
+                          (MVT::SimpleValueType)InnerVT, Expand);
   }
   setLoadExtAction(ISD::EXTLOAD, VT.getSimpleVT(), Expand);
 

Modified: llvm/trunk/test/CodeGen/ARM/vmov.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/vmov.ll?rev=117940&r1=117939&r2=117940&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/vmov.ll (original)
+++ llvm/trunk/test/CodeGen/ARM/vmov.ll Mon Nov  1 13:31:39 2010
@@ -343,3 +343,13 @@
 declare <8 x i8>  @llvm.arm.neon.vqmovnsu.v8i8(<8 x i16>) nounwind readnone
 declare <4 x i16> @llvm.arm.neon.vqmovnsu.v4i16(<4 x i32>) nounwind readnone
 declare <2 x i32> @llvm.arm.neon.vqmovnsu.v2i32(<2 x i64>) nounwind readnone
+
+; Truncating vector stores are not supported.  The following should not crash.
+; Radar 8598391.
+define void @noTruncStore(<4 x i32>* %a, <4 x i16>* %b) nounwind {
+;CHECK: vmovn
+  %tmp1 = load <4 x i32>* %a, align 16
+  %tmp2 = trunc <4 x i32> %tmp1 to <4 x i16>
+  store <4 x i16> %tmp2, <4 x i16>* %b, align 8
+  ret void
+}