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llvm-for-llvmta/test/Transforms/LoopVectorize/ARM/tail-folding-allowed.ll

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; RUN: opt -mtriple=thumbv8.1m.main-arm-eabihf -mattr=+mve.fp -loop-vectorize -tail-predication=enabled -S < %s | \
; RUN: FileCheck %s
; Test that ARMTTIImpl::preferPredicateOverEpilogue triggers tail-folding.
define dso_local void @f1(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i32* noalias nocapture readonly %C, i32 %N) {
; CHECK-LABEL: f1(
; CHECK: entry:
; CHECK: @llvm.get.active.lane.mask
; CHECK: }
entry:
%cmp8 = icmp sgt i32 %N, 0
br i1 %cmp8, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
br label %for.body
for.cond.cleanup.loopexit: ; preds = %for.body
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
ret void
for.body: ; preds = %for.body.preheader, %for.body
%i.09 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %i.09
%0 = load i32, i32* %arrayidx, align 4
%arrayidx1 = getelementptr inbounds i32, i32* %C, i32 %i.09
%1 = load i32, i32* %arrayidx1, align 4
%add = add nsw i32 %1, %0
%arrayidx2 = getelementptr inbounds i32, i32* %A, i32 %i.09
store i32 %add, i32* %arrayidx2, align 4
%inc = add nuw nsw i32 %i.09, 1
%exitcond.not = icmp eq i32 %inc, %N
br i1 %exitcond.not, label %for.cond.cleanup.loopexit, label %for.body
}
define dso_local void @f32_reduction(float* nocapture readonly %Input, i32 %N, float* nocapture %Output) {
; CHECK-LABEL: f32_reduction(
; CHECK: vector.body:
; CHECK: @llvm.masked.load
; CHECK: br i1 %{{.*}}, label {{.*}}, label %vector.body
entry:
%cmp6 = icmp eq i32 %N, 0
br i1 %cmp6, label %while.end, label %while.body.preheader
while.body.preheader: ; preds = %entry
br label %while.body
while.body: ; preds = %while.body.preheader, %while.body
%blkCnt.09 = phi i32 [ %dec, %while.body ], [ %N, %while.body.preheader ]
%sum.08 = phi float [ %add, %while.body ], [ 0.000000e+00, %while.body.preheader ]
%Input.addr.07 = phi float* [ %incdec.ptr, %while.body ], [ %Input, %while.body.preheader ]
%incdec.ptr = getelementptr inbounds float, float* %Input.addr.07, i32 1
%0 = load float, float* %Input.addr.07, align 4
%add = fadd fast float %0, %sum.08
%dec = add i32 %blkCnt.09, -1
%cmp = icmp eq i32 %dec, 0
br i1 %cmp, label %while.end.loopexit, label %while.body
while.end.loopexit: ; preds = %while.body
%add.lcssa = phi float [ %add, %while.body ]
br label %while.end
while.end: ; preds = %while.end.loopexit, %entry
%sum.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add.lcssa, %while.end.loopexit ]
%conv = uitofp i32 %N to float
%div = fdiv fast float %sum.0.lcssa, %conv
store float %div, float* %Output, align 4
ret void
}
define dso_local void @f16_reduction(half* nocapture readonly %Input, i32 %N, half* nocapture %Output) {
; CHECK-LABEL: f16_reduction(
; CHECK: vector.body:
; CHECK: @llvm.masked.load
; CHECK: br i1 %{{.*}}, label {{.*}}, label %vector.body
entry:
%cmp6 = icmp eq i32 %N, 0
br i1 %cmp6, label %while.end, label %while.body.preheader
while.body.preheader: ; preds = %entry
br label %while.body
while.body: ; preds = %while.body.preheader, %while.body
%blkCnt.09 = phi i32 [ %dec, %while.body ], [ %N, %while.body.preheader ]
%sum.08 = phi half [ %add, %while.body ], [ 0.000000e+00, %while.body.preheader ]
%Input.addr.07 = phi half* [ %incdec.ptr, %while.body ], [ %Input, %while.body.preheader ]
%incdec.ptr = getelementptr inbounds half, half* %Input.addr.07, i32 1
%0 = load half, half* %Input.addr.07, align 2
%add = fadd fast half %0, %sum.08
%dec = add i32 %blkCnt.09, -1
%cmp = icmp eq i32 %dec, 0
br i1 %cmp, label %while.end.loopexit, label %while.body
while.end.loopexit: ; preds = %while.body
%add.lcssa = phi half [ %add, %while.body ]
br label %while.end
while.end: ; preds = %while.end.loopexit, %entry
%sum.0.lcssa = phi half [ 0.000000e+00, %entry ], [ %add.lcssa, %while.end.loopexit ]
%conv = uitofp i32 %N to half
%div = fdiv fast half %sum.0.lcssa, %conv
store half %div, half* %Output, align 2
ret void
}
define dso_local void @mixed_f32_i32_reduction(float* nocapture readonly %fInput, i32* nocapture readonly %iInput, i32 %N, float* nocapture %fOutput, i32* nocapture %iOutput) {
; CHECK-LABEL: mixed_f32_i32_reduction(
; CHECK: vector.body:
; CHECK: @llvm.masked.load
; CHECK: br i1 %{{.*}}, label {{.*}}, label %vector.body
entry:
%cmp15 = icmp eq i32 %N, 0
br i1 %cmp15, label %while.end, label %while.body.preheader
while.body.preheader:
br label %while.body
while.body:
%blkCnt.020 = phi i32 [ %dec, %while.body ], [ %N, %while.body.preheader ]
%isum.019 = phi i32 [ %add2, %while.body ], [ 0, %while.body.preheader ]
%fsum.018 = phi float [ %add, %while.body ], [ 0.000000e+00, %while.body.preheader ]
%fInput.addr.017 = phi float* [ %incdec.ptr, %while.body ], [ %fInput, %while.body.preheader ]
%iInput.addr.016 = phi i32* [ %incdec.ptr1, %while.body ], [ %iInput, %while.body.preheader ]
%incdec.ptr = getelementptr inbounds float, float* %fInput.addr.017, i32 1
%incdec.ptr1 = getelementptr inbounds i32, i32* %iInput.addr.016, i32 1
%0 = load i32, i32* %iInput.addr.016, align 4
%add2 = add nsw i32 %0, %isum.019
%1 = load float, float* %fInput.addr.017, align 4
%add = fadd fast float %1, %fsum.018
%dec = add i32 %blkCnt.020, -1
%cmp = icmp eq i32 %dec, 0
br i1 %cmp, label %while.end.loopexit, label %while.body
while.end.loopexit:
%add.lcssa = phi float [ %add, %while.body ]
%add2.lcssa = phi i32 [ %add2, %while.body ]
%phitmp = sitofp i32 %add2.lcssa to float
br label %while.end
while.end:
%fsum.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add.lcssa, %while.end.loopexit ]
%isum.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %phitmp, %while.end.loopexit ]
%conv = uitofp i32 %N to float
%div = fdiv fast float %fsum.0.lcssa, %conv
store float %div, float* %fOutput, align 4
%div5 = fdiv fast float %isum.0.lcssa, %conv
%conv6 = fptosi float %div5 to i32
store i32 %conv6, i32* %iOutput, align 4
ret void
}
define dso_local i32 @i32_mul_reduction(i32* noalias nocapture readonly %B, i32 %N) {
; CHECK-LABEL: i32_mul_reduction(
; CHECK: vector.body:
; CHECK: @llvm.masked.load
; CHECK: br i1 %{{.*}}, label {{.*}}, label %vector.body
entry:
%cmp6 = icmp sgt i32 %N, 0
br i1 %cmp6, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader:
br label %for.body
for.cond.cleanup.loopexit:
%mul.lcssa = phi i32 [ %mul, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup:
%S.0.lcssa = phi i32 [ 1, %entry ], [ %mul.lcssa, %for.cond.cleanup.loopexit ]
ret i32 %S.0.lcssa
for.body:
%i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
%S.07 = phi i32 [ %mul, %for.body ], [ 1, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %i.08
%0 = load i32, i32* %arrayidx, align 4
%mul = mul nsw i32 %0, %S.07
%inc = add nuw nsw i32 %i.08, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
}
define dso_local i32 @i32_or_reduction(i32* noalias nocapture readonly %B, i32 %N) {
; CHECK-LABEL: i32_or_reduction(
; CHECK: vector.body:
; CHECK: @llvm.masked.load
; CHECK: br i1 %{{.*}}, label {{.*}}, label %vector.body
entry:
%cmp6 = icmp sgt i32 %N, 0
br i1 %cmp6, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
br label %for.body
for.cond.cleanup.loopexit: ; preds = %for.body
%or.lcssa = phi i32 [ %or, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
%S.0.lcssa = phi i32 [ 1, %entry ], [ %or.lcssa, %for.cond.cleanup.loopexit ]
ret i32 %S.0.lcssa
for.body: ; preds = %for.body.preheader, %for.body
%i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
%S.07 = phi i32 [ %or, %for.body ], [ 1, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %i.08
%0 = load i32, i32* %arrayidx, align 4
%or = or i32 %0, %S.07
%inc = add nuw nsw i32 %i.08, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
}
define dso_local i32 @i32_and_reduction(i32* noalias nocapture readonly %A, i32 %N, i32 %S) {
; CHECK-LABEL: i32_and_reduction(
; CHECK: vector.body:
; CHECK: @llvm.masked.load
; CHECK: br i1 %{{.*}}, label {{.*}}, label %vector.body
entry:
%cmp5 = icmp sgt i32 %N, 0
br i1 %cmp5, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
br label %for.body
for.cond.cleanup.loopexit: ; preds = %for.body
%and.lcssa = phi i32 [ %and, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
%S.addr.0.lcssa = phi i32 [ %S, %entry ], [ %and.lcssa, %for.cond.cleanup.loopexit ]
ret i32 %S.addr.0.lcssa
for.body: ; preds = %for.body.preheader, %for.body
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
%S.addr.06 = phi i32 [ %and, %for.body ], [ %S, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.07
%0 = load i32, i32* %arrayidx, align 4
%and = and i32 %0, %S.addr.06
%inc = add nuw nsw i32 %i.07, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
}
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