1 files changed, 35 insertions, 10 deletions
diff --git a/test/Transforms/LoopVectorize/reduction.ll b/test/Transforms/LoopVectorize/reduction.ll
index 286b736..18a0a93 100644
--- a/test/Transforms/LoopVectorize/reduction.ll
+++ b/test/Transforms/LoopVectorize/reduction.ll
@@ -3,7 +3,7 @@
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
 target triple = "x86_64-apple-macosx10.8.0"
 
-;CHECK: @reduction_sum
+;CHECK-LABEL: @reduction_sum(
 ;CHECK: phi <4 x i32>
 ;CHECK: load <4 x i32>
 ;CHECK: add <4 x i32>
@@ -38,7 +38,7 @@ define i32 @reduction_sum(i32 %n, i32* noalias nocapture %A, i32* noalias nocapt
   ret i32 %sum.0.lcssa
 }
 
-;CHECK: @reduction_prod
+;CHECK-LABEL: @reduction_prod(
 ;CHECK: phi <4 x i32>
 ;CHECK: load <4 x i32>
 ;CHECK: mul <4 x i32>
@@ -73,7 +73,7 @@ define i32 @reduction_prod(i32 %n, i32* noalias nocapture %A, i32* noalias nocap
   ret i32 %prod.0.lcssa
 }
 
-;CHECK: @reduction_mix
+;CHECK-LABEL: @reduction_mix(
 ;CHECK: phi <4 x i32>
 ;CHECK: load <4 x i32>
 ;CHECK: mul nsw <4 x i32>
@@ -108,7 +108,7 @@ define i32 @reduction_mix(i32 %n, i32* noalias nocapture %A, i32* noalias nocapt
   ret i32 %sum.0.lcssa
 }
 
-;CHECK: @reduction_mul
+;CHECK-LABEL: @reduction_mul(
 ;CHECK: mul <4 x i32>
 ;CHECK: shufflevector <4 x i32> %{{.*}}, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
 ;CHECK: mul <4 x i32>
@@ -141,7 +141,7 @@ define i32 @reduction_mul(i32 %n, i32* noalias nocapture %A, i32* noalias nocapt
   ret i32 %sum.0.lcssa
 }
 
-;CHECK: @start_at_non_zero
+;CHECK-LABEL: @start_at_non_zero(
 ;CHECK: phi <4 x i32>
 ;CHECK: <i32 120, i32 0, i32 0, i32 0>
 ;CHECK: shufflevector <4 x i32> %{{.*}}, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
@@ -174,7 +174,7 @@ for.end:                                          ; preds = %for.body, %entry
   ret i32 %sum.0.lcssa
 }
 
-;CHECK: @reduction_and
+;CHECK-LABEL: @reduction_and(
 ;CHECK: and <4 x i32>
 ;CHECK: <i32 -1, i32 -1, i32 -1, i32 -1>
 ;CHECK: shufflevector <4 x i32> %{{.*}}, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
@@ -207,7 +207,7 @@ for.end:                                          ; preds = %for.body, %entry
   ret i32 %result.0.lcssa
 }
 
-;CHECK: @reduction_or
+;CHECK-LABEL: @reduction_or(
 ;CHECK: or <4 x i32>
 ;CHECK: shufflevector <4 x i32> %{{.*}}, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
 ;CHECK: or <4 x i32>
@@ -239,7 +239,7 @@ for.end:                                          ; preds = %for.body, %entry
   ret i32 %result.0.lcssa
 }
 
-;CHECK: @reduction_xor
+;CHECK-LABEL: @reduction_xor(
 ;CHECK: xor <4 x i32>
 ;CHECK: shufflevector <4 x i32> %{{.*}}, <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
 ;CHECK: xor <4 x i32>
@@ -272,7 +272,7 @@ for.end:                                          ; preds = %for.body, %entry
 }
 
 ; In this code the subtracted variable is on the RHS and this is not an induction variable.
-;CHECK: @reduction_sub_rhs
+;CHECK-LABEL: @reduction_sub_rhs(
 ;CHECK-NOT: phi <4 x i32>
 ;CHECK-NOT: sub nsw <4 x i32>
 ;CHECK: ret i32
@@ -299,7 +299,7 @@ for.end:                                          ; preds = %for.body, %entry
 
 
 ; In this test the reduction variable is on the LHS and we can vectorize it.
-;CHECK: @reduction_sub_lhs
+;CHECK-LABEL: @reduction_sub_lhs(
 ;CHECK: phi <4 x i32>
 ;CHECK: sub nsw <4 x i32>
 ;CHECK: ret i32
@@ -442,3 +442,28 @@ for.end:
   %add2 = fadd fast float %add.lcssa, %add1.lcssa
   ret float %add2
 }
+
+
+; When vectorizing a reduction whose loop header phi value is used outside the
+; loop special care must be taken. Otherwise, the reduced value feeding into the
+; outside user misses a few iterations (VF-1) of the loop.
+; PR16522
+
+; CHECK-LABEL: @phivalueredux(
+; CHECK-NOT: x i32>
+
+define i32 @phivalueredux(i32 %p) {
+entry:
+  br label %for.body
+
+for.body:
+  %t.03 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+  %p.addr.02 = phi i32 [ %p, %entry ], [ %xor, %for.body ]
+  %xor = xor i32 %p.addr.02, -1
+  %inc = add nsw i32 %t.03, 1
+  %exitcond = icmp eq i32 %inc, 16
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret i32 %p.addr.02
+}