-; RUN: opt < %s -debug-only=loop-vectorize -loop-vectorize -vectorizer-maximize-bandwidth -O2 -S 2>&1 | FileCheck %s
-; REQUIRES: asserts
-
-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-unknown-linux-gnu"
-
-@a = global [1024 x i8] zeroinitializer, align 16
-@b = global [1024 x i8] zeroinitializer, align 16
-
-define i32 @foo() {
-; This function has a loop of SAD pattern. Here we check when VF = 16 the
-; register usage doesn't exceed 16.
-;
-; CHECK-LABEL: foo
-; CHECK: LV(REG): VF = 4
-; CHECK-NEXT: LV(REG): Found max usage: 4
-; CHECK: LV(REG): VF = 8
-; CHECK-NEXT: LV(REG): Found max usage: 7
-; CHECK: LV(REG): VF = 16
-; CHECK-NEXT: LV(REG): Found max usage: 13
-
-entry:
- br label %for.body
-
-for.cond.cleanup:
- %add.lcssa = phi i32 [ %add, %for.body ]
- ret i32 %add.lcssa
-
-for.body:
- %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
- %s.015 = phi i32 [ 0, %entry ], [ %add, %for.body ]
- %arrayidx = getelementptr inbounds [1024 x i8], [1024 x i8]* @a, i64 0, i64 %indvars.iv
- %0 = load i8, i8* %arrayidx, align 1
- %conv = zext i8 %0 to i32
- %arrayidx2 = getelementptr inbounds [1024 x i8], [1024 x i8]* @b, i64 0, i64 %indvars.iv
- %1 = load i8, i8* %arrayidx2, align 1
- %conv3 = zext i8 %1 to i32
- %sub = sub nsw i32 %conv, %conv3
- %ispos = icmp sgt i32 %sub, -1
- %neg = sub nsw i32 0, %sub
- %2 = select i1 %ispos, i32 %sub, i32 %neg
- %add = add nsw i32 %2, %s.015
- %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
- %exitcond = icmp eq i64 %indvars.iv.next, 1024
- br i1 %exitcond, label %for.cond.cleanup, label %for.body
-}
-
-define i64 @bar(i64* nocapture %a) {
-; CHECK-LABEL: bar
-; CHECK: LV(REG): VF = 2
-; CHECK: LV(REG): Found max usage: 4
-;
-entry:
- br label %for.body
-
-for.cond.cleanup:
- %add2.lcssa = phi i64 [ %add2, %for.body ]
- ret i64 %add2.lcssa
-
-for.body:
- %i.012 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
- %s.011 = phi i64 [ 0, %entry ], [ %add2, %for.body ]
- %arrayidx = getelementptr inbounds i64, i64* %a, i64 %i.012
- %0 = load i64, i64* %arrayidx, align 8
- %add = add nsw i64 %0, %i.012
- store i64 %add, i64* %arrayidx, align 8
- %add2 = add nsw i64 %add, %s.011
- %inc = add nuw nsw i64 %i.012, 1
- %exitcond = icmp eq i64 %inc, 1024
- br i1 %exitcond, label %for.cond.cleanup, label %for.body
-}