[X86] Auto-upgrade AVX1 vbroadcast intrinsics

They are replaced with the same IR that is generated for the
vector-initializers in avxintrin.h.

The test verifies that we get back the original instruction.  I haven't seen
this approach to be used in other auto-upgrade tests (i.e. llc + FileCheck)
but I think it's the most direct way to test this case.  I believe this should
work because llc upgrades calls during parsing.  (Other tests mostly check
that assembling and disassembling yields the upgraded IR.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209863 91177308-0d34-0410-b5e6-96231b3b80d8

test/Bitcode/x86-upgrade-avx-vbroadcast.ll

@@ -0,0 +1,41 @@
+; RUN: llc -mattr=+avx < %s | FileCheck %s
+
+; Check that we properly upgrade the AVX vbroadcast intrinsics to IR.  The
+; expectation is that we should still get the original instruction back that
+; maps to the intrinsic.
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.9.0"
+
+; CHECK-LABEL: test_mm_broadcast_ss:
+define <4 x float> @test_mm_broadcast_ss(float* readonly %__a){
+entry:
+  %0 = bitcast float* %__a to i8*
+; CHECK: vbroadcastss (%{{.*}}), %xmm
+  %1 = tail call <4 x float> @llvm.x86.avx.vbroadcast.ss(i8* %0)
+  ret <4 x float> %1
+}
+
+; CHECK-LABEL: test_mm256_broadcast_sd:
+define <4 x double> @test_mm256_broadcast_sd(double* readonly %__a) {
+entry:
+  %0 = bitcast double* %__a to i8*
+; CHECK: vbroadcastsd (%{{.*}}), %ymm
+  %1 = tail call <4 x double> @llvm.x86.avx.vbroadcast.sd.256(i8* %0)
+  ret <4 x double> %1
+}
+
+; CHECK-LABEL: test_mm256_broadcast_ss:
+define <8 x float> @test_mm256_broadcast_ss(float* readonly %__a) {
+entry:
+  %0 = bitcast float* %__a to i8*
+; CHECK: vbroadcastss (%{{.*}}), %ymm
+  %1 = tail call <8 x float> @llvm.x86.avx.vbroadcast.ss.256(i8* %0)
+  ret <8 x float> %1
+}
+
+declare <8 x float> @llvm.x86.avx.vbroadcast.ss.256(i8*)
+
+declare <4 x double> @llvm.x86.avx.vbroadcast.sd.256(i8*)
+
+declare <4 x float> @llvm.x86.avx.vbroadcast.ss(i8*)