TypeLegalizer: Add support for passing of vector-promoted types in registers (copyFromParts/copyToParts).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132649 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/Generic/basic-promote-integers.ll

@@ -0,0 +1,20 @@
+; Test that vectors are scalarized/lowered correctly
+; (with both legalization methods).
+; RUN: llc -march=x86 -promote-elements < %s
+; RUN: llc -march=x86                   < %s
+
+; A simple test to check copyToParts and copyFromParts
+
+define <4 x i64> @test_param_0(<4 x i64> %A, <2 x i32> %B, <4 x i8> %C)  {
+   ret <4 x i64> %A
+}
+
+define <2 x i32> @test_param_1(<4 x i64> %A, <2 x i32> %B, <4 x i8> %C)  {
+   ret <2 x i32> %B
+}
+
+define <4 x i8> @test_param_2(<4 x i64> %A, <2 x i32> %B, <4 x i8> %C)  {
+   ret <4 x i8> %C
+}
+
+