| ; 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 |
| } |