Index: test/Transforms/LoopVectorize/vector-variant/loop-x86.ll
===================================================================
--- /dev/null
+++ test/Transforms/LoopVectorize/vector-variant/loop-x86.ll
@@ -0,0 +1,75 @@
+; RUN: opt < %s -S  -loop-vectorize -force-vector-interleave=1 -mattr=+sse \
+; RUN:     | FileCheck %s --check-prefix=SSE
+
+; RUN: opt < %s -S  -loop-vectorize -force-vector-interleave=1 -mattr=+avx \
+; RUN:     | FileCheck %s --check-prefix=AVX
+
+; RUN: opt < %s -S  -loop-vectorize -force-vector-interleave=1 -mattr=+avx2 \
+; RUN:     | FileCheck %s --check-prefix=AVX2
+
+; RUN: opt < %s -S  -loop-vectorize -force-vector-interleave=1 -mattr=+avx512f \
+; RUN:     | FileCheck %s --check-prefix=AVX512
+
+; This is targeting SSE, the other vector extensions are not used.
+; SSE-NOT: @_ZGVc
+; SSE-NOT: @_ZGVd
+; SSE-NOT: @_ZGVe
+; SSE-LABEL: void @loop
+; SSE: call <2 x double> @_ZGVbN2v_foo
+
+; This is targeting AVX, the other vector extensions are not used.
+; AVX-NOT: @_ZGVb
+; AVX-NOT: @_ZGVd
+; AVX-NOT: @_ZGVe
+; AVX-LABEL: void @loop
+; AVX: call <4 x double> @_ZGVcN4v_foo
+
+; This is targeting AVX2, the other vector extensions are not used.
+; AVX2-NOT: @_ZGVb
+; AVX2-NOT: @_ZGVc
+; AVX2-NOT: @_ZGVe
+; AVX2-LABEL: void @loop
+; AVX2: call <4 x double> @_ZGVdN4v_foo
+
+; This is targeting AVX512, the other vector extensions are not used.
+; AVX512-NOT: @_ZGVb
+; AVX512-NOT: @_ZGVc
+; AVX512-NOT: @_ZGVd
+; AVX512-LABEL: void @loop
+; AVX512: call <8 x double> @_ZGVeN8v_foo
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define double @foo(double %x) #0 {
+entry:
+  %mul = fmul double %x, 2.000000e+00
+  %add = fadd double %mul, 1.000000e+00
+  ret double %add
+}
+
+define void @loop(double* noalias nocapture readonly %x, double* nocapture %y, i32 %n) {
+entry:
+  %cmp9 = icmp eq i32 %n, 0
+  br i1 %cmp9, label %for.cond.cleanup, label %for.body.preheader
+
+for.body.preheader:                               ; preds = %entry
+  %wide.trip.count = zext i32 %n to i64
+  br label %for.body
+
+for.cond.cleanup:                                 ; preds = %for.body, %entry
+  ret void
+
+for.body:                                         ; preds = %for.body, %for.body.preheader
+  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
+  %arrayidx = getelementptr inbounds double, double* %x, i64 %indvars.iv
+  %0 = load double, double* %arrayidx, align 8 
+  %call = tail call double @foo(double %0)
+  %arrayidx3 = getelementptr inbounds double, double* %y, i64 %indvars.iv
+  store double %call, double* %arrayidx3, align 8
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
+  br i1 %exitcond, label %for.cond.cleanup, label %for.body
+}
+
+attributes #0 = { noinline "vector-variants"="_ZGVbN2v_foo, _ZGVcN4v_foo, _ZGVdN4v_foo, _ZGVeN8v_foo" }