tail-folding-reductions-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 -check-prefixes=COMMON,CHECK
; RUN: opt -mtriple=thumbv8.1m.main-arm-eabihf -mattr=+mve.fp -loop-vectorize -tail-predication=enabled-no-reductions -S < %s | \
; RUN: FileCheck %s -check-prefixes=COMMON,NORED
; RUN: opt -mtriple=thumbv8.1m.main-arm-eabihf -mattr=+mve.fp -loop-vectorize -tail-predication=force-enabled-no-reductions -S < %s | \
; RUN: FileCheck %s -check-prefixes=COMMON,NORED
; Check that this reduction is allowed, except when reductions are disable on
; the command line.
;
define dso_local i32 @i32_add_reduction(i32* noalias nocapture readonly %B, i32 %N) local_unnamed_addr #0 {
; COMMON-LABEL: i32_add_reduction(
; COMMON: entry:
; CHECK: @llvm.get.active.lane.mask
; NORED-NOT: @llvm.get.active.lane.mask
; COMMON: }
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:
%add.lcssa = phi i32 [ %add, %for.body ]
br label %for.cond.cleanup
for.cond.cleanup:
%S.0.lcssa = phi i32 [ 1, %entry ], [ %add.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 [ %add, %for.body ], [ 1, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %B, i32 %i.08
%0 = load i32, i32* %arrayidx, align 4
%add = add 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
}