Merging r223170:

Apply loop-rotate to several vectorizer tests.

Such loops shouldn't be vectorized due to the loops form.
After applying loop-rotate (+simplifycfg) the tests again start to check
what they are intended to check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_35@223534 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopVectorize/runtime-check-address-space.ll b/test/Transforms/LoopVectorize/runtime-check-address-space.ll
index 5bf7020a475aaff89ad6e290aa44fdd3e935fc3f..848ffc428c5ff84b0b160f5a5359021373833bf2 100644 (file)
--- a/test/Transforms/LoopVectorize/runtime-check-address-space.ll
+++ b/test/Transforms/LoopVectorize/runtime-check-address-space.ll
@@ -31,25 +31,23 @@ define void @foo(i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
-
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %idxprom
   %0 = load i32 addrspace(1)* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds i32 addrspace(1)* %a, i64 %idxprom1
   store i32 %mul, i32 addrspace(1)* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
@@ -60,25 +58,23 @@ define void @bar0(i32* %a, i32 addrspace(1)* %b, i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
-
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %idxprom
   %0 = load i32 addrspace(1)* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds i32* %a, i64 %idxprom1
   store i32 %mul, i32* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
@@ -89,25 +85,23 @@ define void @bar1(i32 addrspace(1)* %a, i32* %b, i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
-
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds i32* %b, i64 %idxprom
   %0 = load i32* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds i32 addrspace(1)* %a, i64 %idxprom1
   store i32 %mul, i32 addrspace(1)* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
@@ -119,25 +113,23 @@ define void @bar2(i32* noalias %a, i32 addrspace(1)* noalias %b, i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
-
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %idxprom
   %0 = load i32 addrspace(1)* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds i32* %a, i64 %idxprom1
   store i32 %mul, i32* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
@@ -149,25 +141,23 @@ define void @arst0(i32* %b, i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
-
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds i32* %b, i64 %idxprom
   %0 = load i32* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds [1024 x i32] addrspace(1)* @g_as1, i64 0, i64 %idxprom1
   store i32 %mul, i32 addrspace(1)* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
@@ -180,25 +170,23 @@ define void @arst1(i32* %b, i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
-
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds [1024 x i32] addrspace(1)* @g_as1, i64 0, i64 %idxprom
   %0 = load i32 addrspace(1)* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds i32* %b, i64 %idxprom1
   store i32 %mul, i32* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 
@@ -210,25 +198,23 @@ define void @aoeu(i32 %n) #0 {
 ; CHECK: ret
 
 entry:
-  br label %for.cond
+  %cmp1 = icmp slt i32 0, %n
+  br i1 %cmp1, label %for.body, label %for.end
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp slt i32 %i.0, %n
-  br i1 %cmp, label %for.body, label %for.end
-
-for.body:                                         ; preds = %for.cond
-  %idxprom = sext i32 %i.0 to i64
+for.body:                                         ; preds = %entry, %for.body
+  %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+  %idxprom = sext i32 %i.02 to i64
   %arrayidx = getelementptr inbounds [1024 x i32] addrspace(2)* @q_as2, i64 0, i64 %idxprom
   %0 = load i32 addrspace(2)* %arrayidx, align 4
   %mul = mul nsw i32 %0, 3
-  %idxprom1 = sext i32 %i.0 to i64
+  %idxprom1 = sext i32 %i.02 to i64
   %arrayidx2 = getelementptr inbounds [1024 x i32] addrspace(1)* @g_as1, i64 0, i64 %idxprom1
   store i32 %mul, i32 addrspace(1)* %arrayidx2, align 4
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
+  %inc = add nsw i32 %i.02, 1
+  %cmp = icmp slt i32 %inc, %n
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body, %entry
   ret void
 }
 

diff --git a/test/Transforms/LoopVectorize/runtime-check-readonly-address-space.ll b/test/Transforms/LoopVectorize/runtime-check-readonly-address-space.ll
index 212b37cceab3a3c0f81359119d673b9e8fa6ab22..4e98ec504f5bb4af8f554b414d8a504535dd8122 100644 (file)
--- a/test/Transforms/LoopVectorize/runtime-check-readonly-address-space.ll
+++ b/test/Transforms/LoopVectorize/runtime-check-readonly-address-space.ll
@@ -8,26 +8,24 @@ define void @add_ints_1_1_1(i32 addrspace(1)* %a, i32 addrspace(1)* %b, i32 addr
 ; CHECK-LABEL: @add_ints_1_1_1(
 ; CHECK: <4 x i32>
 ; CHECK: ret
-entry:
-  br label %for.cond
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp ult i64 %i.0, 200
-  br i1 %cmp, label %for.body, label %for.end
+entry:
+  br label %for.body
 
-for.body:                                         ; preds = %for.cond
-  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.0
+for.body:                                         ; preds = %entry, %for.body
+  %i.01 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.01
   %0 = load i32 addrspace(1)* %arrayidx, align 4
-  %arrayidx1 = getelementptr inbounds i32 addrspace(1)* %c, i64 %i.0
+  %arrayidx1 = getelementptr inbounds i32 addrspace(1)* %c, i64 %i.01
   %1 = load i32 addrspace(1)* %arrayidx1, align 4
   %add = add nsw i32 %0, %1
-  %arrayidx2 = getelementptr inbounds i32 addrspace(1)* %a, i64 %i.0
+  %arrayidx2 = getelementptr inbounds i32 addrspace(1)* %a, i64 %i.01
   store i32 %add, i32 addrspace(1)* %arrayidx2, align 4
-  %inc = add i64 %i.0, 1
-  br label %for.cond
+  %inc = add i64 %i.01, 1
+  %cmp = icmp ult i64 %inc, 200
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body
   ret void
 }
 
@@ -35,26 +33,24 @@ define void @add_ints_as_1_0_0(i32 addrspace(1)* %a, i32* %b, i32* %c) #0 {
 ; CHECK-LABEL: @add_ints_as_1_0_0(
 ; CHECK-NOT: <4 x i32>
 ; CHECK: ret
-entry:
-  br label %for.cond
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp ult i64 %i.0, 200
-  br i1 %cmp, label %for.body, label %for.end
+entry:
+  br label %for.body
 
-for.body:                                         ; preds = %for.cond
-  %arrayidx = getelementptr inbounds i32* %b, i64 %i.0
+for.body:                                         ; preds = %entry, %for.body
+  %i.01 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+  %arrayidx = getelementptr inbounds i32* %b, i64 %i.01
   %0 = load i32* %arrayidx, align 4
-  %arrayidx1 = getelementptr inbounds i32* %c, i64 %i.0
+  %arrayidx1 = getelementptr inbounds i32* %c, i64 %i.01
   %1 = load i32* %arrayidx1, align 4
   %add = add nsw i32 %0, %1
-  %arrayidx2 = getelementptr inbounds i32 addrspace(1)* %a, i64 %i.0
+  %arrayidx2 = getelementptr inbounds i32 addrspace(1)* %a, i64 %i.01
   store i32 %add, i32 addrspace(1)* %arrayidx2, align 4
-  %inc = add i64 %i.0, 1
-  br label %for.cond
+  %inc = add i64 %i.01, 1
+  %cmp = icmp ult i64 %inc, 200
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body
   ret void
 }
 
@@ -62,26 +58,24 @@ define void @add_ints_as_0_1_0(i32* %a, i32 addrspace(1)* %b, i32* %c) #0 {
 ; CHECK-LABEL: @add_ints_as_0_1_0(
 ; CHECK-NOT: <4 x i32>
 ; CHECK: ret
-entry:
-  br label %for.cond
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp ult i64 %i.0, 200
-  br i1 %cmp, label %for.body, label %for.end
+entry:
+  br label %for.body
 
-for.body:                                         ; preds = %for.cond
-  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.0
+for.body:                                         ; preds = %entry, %for.body
+  %i.01 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.01
   %0 = load i32 addrspace(1)* %arrayidx, align 4
-  %arrayidx1 = getelementptr inbounds i32* %c, i64 %i.0
+  %arrayidx1 = getelementptr inbounds i32* %c, i64 %i.01
   %1 = load i32* %arrayidx1, align 4
   %add = add nsw i32 %0, %1
-  %arrayidx2 = getelementptr inbounds i32* %a, i64 %i.0
+  %arrayidx2 = getelementptr inbounds i32* %a, i64 %i.01
   store i32 %add, i32* %arrayidx2, align 4
-  %inc = add i64 %i.0, 1
-  br label %for.cond
+  %inc = add i64 %i.01, 1
+  %cmp = icmp ult i64 %inc, 200
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body
   ret void
 }
 
@@ -89,26 +83,24 @@ define void @add_ints_as_0_1_1(i32* %a, i32 addrspace(1)* %b, i32 addrspace(1)*
 ; CHECK-LABEL: @add_ints_as_0_1_1(
 ; CHECK-NOT: <4 x i32>
 ; CHECK: ret
-entry:
-  br label %for.cond
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp ult i64 %i.0, 200
-  br i1 %cmp, label %for.body, label %for.end
+entry:
+  br label %for.body
 
-for.body:                                         ; preds = %for.cond
-  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.0
+for.body:                                         ; preds = %entry, %for.body
+  %i.01 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.01
   %0 = load i32 addrspace(1)* %arrayidx, align 4
-  %arrayidx1 = getelementptr inbounds i32 addrspace(1)* %c, i64 %i.0
+  %arrayidx1 = getelementptr inbounds i32 addrspace(1)* %c, i64 %i.01
   %1 = load i32 addrspace(1)* %arrayidx1, align 4
   %add = add nsw i32 %0, %1
-  %arrayidx2 = getelementptr inbounds i32* %a, i64 %i.0
+  %arrayidx2 = getelementptr inbounds i32* %a, i64 %i.01
   store i32 %add, i32* %arrayidx2, align 4
-  %inc = add i64 %i.0, 1
-  br label %for.cond
+  %inc = add i64 %i.01, 1
+  %cmp = icmp ult i64 %inc, 200
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body
   ret void
 }
 
@@ -116,26 +108,24 @@ define void @add_ints_as_0_1_2(i32* %a, i32 addrspace(1)* %b, i32 addrspace(2)*
 ; CHECK-LABEL: @add_ints_as_0_1_2(
 ; CHECK-NOT: <4 x i32>
 ; CHECK: ret
-entry:
-  br label %for.cond
 
-for.cond:                                         ; preds = %for.body, %entry
-  %i.0 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
-  %cmp = icmp ult i64 %i.0, 200
-  br i1 %cmp, label %for.body, label %for.end
+entry:
+  br label %for.body
 
-for.body:                                         ; preds = %for.cond
-  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.0
+for.body:                                         ; preds = %entry, %for.body
+  %i.01 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+  %arrayidx = getelementptr inbounds i32 addrspace(1)* %b, i64 %i.01
   %0 = load i32 addrspace(1)* %arrayidx, align 4
-  %arrayidx1 = getelementptr inbounds i32 addrspace(2)* %c, i64 %i.0
+  %arrayidx1 = getelementptr inbounds i32 addrspace(2)* %c, i64 %i.01
   %1 = load i32 addrspace(2)* %arrayidx1, align 4
   %add = add nsw i32 %0, %1
-  %arrayidx2 = getelementptr inbounds i32* %a, i64 %i.0
+  %arrayidx2 = getelementptr inbounds i32* %a, i64 %i.01
   store i32 %add, i32* %arrayidx2, align 4
-  %inc = add i64 %i.0, 1
-  br label %for.cond
+  %inc = add i64 %i.01, 1
+  %cmp = icmp ult i64 %inc, 200
+  br i1 %cmp, label %for.body, label %for.end
 
-for.end:                                          ; preds = %for.cond
+for.end:                                          ; preds = %for.body
   ret void
 }
 

diff --git a/test/Transforms/LoopVectorize/vect.stats.ll b/test/Transforms/LoopVectorize/vect.stats.ll
index 92ec24f726eec1e4d467034995a5569b618b7e12..9adf2bb6cf14f1f8cc8e21a87c6a4987553defaf 100644 (file)
--- a/test/Transforms/LoopVectorize/vect.stats.ll
+++ b/test/Transforms/LoopVectorize/vect.stats.ll
@@ -13,53 +13,47 @@ target triple = "x86_64-unknown-linux-gnu"
 
 define void @vectorized(float* nocapture %a, i64 %size) {
 entry:
-  %cmp1 = icmp sgt i64 %size, 0
-  br i1 %cmp1, label %for.header, label %for.end
-
-for.header:
-  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
-  %cmp2 = icmp sgt i64 %indvars.iv, %size
-  br i1 %cmp2, label %for.end, label %for.body
-
-for.body:
-
-  %arrayidx = getelementptr inbounds float* %a, i64 %indvars.iv
+  %cmp1 = icmp sle i64 %size, 0
+  %cmp21 = icmp sgt i64 0, %size
+  %or.cond = or i1 %cmp1, %cmp21
+  br i1 %or.cond, label %for.end, label %for.body
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv2 = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
+  %arrayidx = getelementptr inbounds float* %a, i64 %indvars.iv2
   %0 = load float* %arrayidx, align 4
   %mul = fmul float %0, %0
   store float %mul, float* %arrayidx, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv2, 1
+  %cmp2 = icmp sgt i64 %indvars.iv.next, %size
+  br i1 %cmp2, label %for.end, label %for.body
 
-  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
-  br label %for.header
-
-for.end:
+for.end:                                          ; preds = %entry, %for.body
   ret void
 }
 
 define void @not_vectorized(float* nocapture %a, i64 %size) {
 entry:
-  %cmp1 = icmp sgt i64 %size, 0
-  br i1 %cmp1, label %for.header, label %for.end
-
-for.header:
-  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
-  %cmp2 = icmp sgt i64 %indvars.iv, %size
-  br i1 %cmp2, label %for.end, label %for.body
-
-for.body:
-
-  %0 = add nsw i64 %indvars.iv, -5
+  %cmp1 = icmp sle i64 %size, 0
+  %cmp21 = icmp sgt i64 0, %size
+  %or.cond = or i1 %cmp1, %cmp21
+  br i1 %or.cond, label %for.end, label %for.body
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv2 = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
+  %0 = add nsw i64 %indvars.iv2, -5
   %arrayidx = getelementptr inbounds float* %a, i64 %0
   %1 = load float* %arrayidx, align 4
-  %2 = add nsw i64 %indvars.iv, 2
+  %2 = add nsw i64 %indvars.iv2, 2
   %arrayidx2 = getelementptr inbounds float* %a, i64 %2
   %3 = load float* %arrayidx2, align 4
   %mul = fmul float %1, %3
-  %arrayidx4 = getelementptr inbounds float* %a, i64 %indvars.iv
+  %arrayidx4 = getelementptr inbounds float* %a, i64 %indvars.iv2
   store float %mul, float* %arrayidx4, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv2, 1
+  %cmp2 = icmp sgt i64 %indvars.iv.next, %size
+  br i1 %cmp2, label %for.end, label %for.body
 
-  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
-  br label %for.header
-
-for.end:
+for.end:                                          ; preds = %entry, %for.body
   ret void
 }
\ No newline at end of file