[mips] Expand vector truncating stores and extending loads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187667 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsSEISelLowering.cpp b/lib/Target/Mips/MipsSEISelLowering.cpp
index 8b5a8746eb24abde00ad8159cc2cfd37f5a87f11..58c8e7ca9edd2d98b07e792712683870ef86f416 100644 (file)
--- a/lib/Target/Mips/MipsSEISelLowering.cpp
+++ b/lib/Target/Mips/MipsSEISelLowering.cpp
@@ -53,6 +53,20 @@ MipsSETargetLowering::MipsSETargetLowering(MipsTargetMachine &TM)
       setOperationAction(ISD::BITCAST, VecTys[i], Legal);
     }
 
+    // Expand all truncating stores and extending loads.
+    unsigned FirstVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
+    unsigned LastVT = (unsigned)MVT::LAST_VECTOR_VALUETYPE;
+
+    for (unsigned VT0 = FirstVT; VT0 <= LastVT; ++VT0) {
+      for (unsigned VT1 = FirstVT; VT1 <= LastVT; ++VT1)
+        setTruncStoreAction((MVT::SimpleValueType)VT0,
+                            (MVT::SimpleValueType)VT1, Expand);
+
+      setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT0, Expand);
+      setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT0, Expand);
+      setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT0, Expand);
+    }
+
     setTargetDAGCombine(ISD::SHL);
     setTargetDAGCombine(ISD::SRA);
     setTargetDAGCombine(ISD::SRL);

diff --git a/test/CodeGen/Mips/dsp-vec-load-store.ll b/test/CodeGen/Mips/dsp-vec-load-store.ll
new file mode 100644 (file)
index 0000000..7e4a8fe
--- /dev/null
+++ b/test/CodeGen/Mips/dsp-vec-load-store.ll
@@ -0,0 +1,11 @@
+; RUN: llc -march=mipsel -mattr=+dsp < %s
+
+@g1 = common global <2 x i8> zeroinitializer, align 2
+@g0 = common global <2 x i8> zeroinitializer, align 2
+
+define void @extend_load_trunc_store_v2i8() {
+entry:
+  %0 = load <2 x i8>* @g1, align 2
+  store <2 x i8> %0, <2 x i8>* @g0, align 2
+  ret void
+}