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; RUN: opt < %s -passes='loop-vectorize' -enable-epilogue-vectorization -S | FileCheck %s
; TODO: For now test for the `-epilogue-vectorization-minimum-VF` option. In
; the future we need to replace this with a more meaningful test of the
; epilogue vectorization cost-model.
; RUN: opt < %s -passes='loop-vectorize' -enable-epilogue-vectorization -epilogue-vectorization-minimum-VF=4 -S | FileCheck %s --check-prefix=CHECK-MIN-4
; RUN: opt < %s -passes='loop-vectorize' -enable-epilogue-vectorization -force-vector-interleave=1 -S | FileCheck %s --check-prefix=CHECK-MIN-IC-1
target datalayout = "e-m:e-i64:64-n32:64"
target triple = "powerpc64le-unknown-linux-gnu"
; Do not vectorize epilogues for loops with minsize attribute
; CHECK-LABEL: @f1
; CHECK-NOT: vector.main.loop.iter.check
; CHECK-NOT: vec.epilog.iter.check
; CHECK-NOT: vec.epilog.ph
; CHECK-NOT: vec.epilog.vector.body
; CHECK-NOT: vec.epilog.middle.block
; CHECK: ret void
define dso_local void @f1(ptr noalias %aa, ptr noalias %bb, ptr noalias %cc, i32 signext %N) #0 {
entry:
%cmp1 = icmp sgt i32 %N, 0
br i1 %cmp1, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
%wide.trip.count = zext i32 %N to i64
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %bb, i64 %indvars.iv
%0 = load float, ptr %arrayidx, align 4
%arrayidx2 = getelementptr inbounds float, ptr %cc, i64 %indvars.iv
%1 = load float, ptr %arrayidx2, align 4
%add = fadd fast float %0, %1
%arrayidx4 = getelementptr inbounds float, ptr %aa, i64 %indvars.iv
store float %add, ptr %arrayidx4, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
; Do not vectorize epilogues for loops with optsize attribute
; CHECK-LABEL: @f2
; CHECK-NOT: vector.main.loop.iter.check
; CHECK-NOT: vec.epilog.iter.check
; CHECK-NOT: vec.epilog.ph
; CHECK-NOT: vec.epilog.vector.body
; CHECK-NOT: vec.epilog.middle.block
; CHECK: ret void
define dso_local void @f2(ptr noalias %aa, ptr noalias %bb, ptr noalias %cc, i32 signext %N) #1 {
entry:
%cmp1 = icmp sgt i32 %N, 0
br i1 %cmp1, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
%wide.trip.count = zext i32 %N to i64
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %bb, i64 %indvars.iv
%0 = load float, ptr %arrayidx, align 4
%arrayidx2 = getelementptr inbounds float, ptr %cc, i64 %indvars.iv
%1 = load float, ptr %arrayidx2, align 4
%add = fadd fast float %0, %1
%arrayidx4 = getelementptr inbounds float, ptr %aa, i64 %indvars.iv
store float %add, ptr %arrayidx4, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
; Do not vectorize the epilogue for loops with VF*IC less than the default -epilogue-vectorization-minimum-VF of 16.
; CHECK-MIN-IC-1-LABEL: @f3
; CHECK-MIN-IC-1-NOT: vector.main.loop.iter.check
; CHECK-MIN-IC-1-NOT: vec.epilog.iter.check
; CHECK-MIN-IC-1-NOT: vec.epilog.ph
; CHECK-MIN-IC-1-NOT: vec.epilog.vector.body
; CHECK-MIN-IC-1-NOT: vec.epilog.middle.block
; CHECK-MIN-IC-1: ret void
; Specify a smaller minimum VF (via `-epilogue-vectorization-minimum-VF=4`) and
; make sure the epilogue gets vectorized in that case.
; CHECK-MIN-4-LABEL: @f3
; CHECK-MIN-4: vector.main.loop.iter.check
; CHECK-MIN-4: vec.epilog.iter.check
; CHECK-MIN-4: vec.epilog.ph
; CHECK-MIN-4: vec.epilog.vector.body
; CHECK-MIN-4: vec.epilog.middle.block
; CHECK-MIN-4: ret void
; Default behaviour is to vectorize the epilogue for this loop.
; CHECK-LABEL: @f3
; CHECK: vector.main.loop.iter.check
; CHECK: vec.epilog.iter.check
; CHECK: vec.epilog.ph
; CHECK: vec.epilog.vector.body
; CHECK: vec.epilog.middle.block
; CHECK: ret void
define dso_local void @f3(ptr noalias %aa, ptr noalias %bb, ptr noalias %cc, i32 signext %N) {
entry:
%cmp1 = icmp sgt i32 %N, 0
br i1 %cmp1, label %for.body.preheader, label %for.end
for.body.preheader: ; preds = %entry
%wide.trip.count = zext i32 %N to i64
br label %for.body
for.body: ; preds = %for.body.preheader, %for.body
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, ptr %bb, i64 %indvars.iv
%0 = load float, ptr %arrayidx, align 4
%arrayidx2 = getelementptr inbounds float, ptr %cc, i64 %indvars.iv
%1 = load float, ptr %arrayidx2, align 4
%add = fadd fast float %0, %1
%arrayidx4 = getelementptr inbounds float, ptr %aa, i64 %indvars.iv
store float %add, ptr %arrayidx4, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
br i1 %exitcond, label %for.body, label %for.end.loopexit
for.end.loopexit: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.end.loopexit, %entry
ret void
}
attributes #0 = { minsize }
attributes #1 = { optsize }
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