169 lines
5.3 KiB
LLVM
169 lines
5.3 KiB
LLVM
; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 -S | FileCheck %s
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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"
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; Make sure that we can handle multiple integer induction variables.
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; CHECK-LABEL: @multi_int_induction(
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; CHECK: vector.body:
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; CHECK: %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
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; CHECK: %[[VAR:.*]] = trunc i64 %index to i32
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; CHECK: %offset.idx = add i32 190, %[[VAR]]
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define void @multi_int_induction(i32* %A, i32 %N) {
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for.body.lr.ph:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
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%count.09 = phi i32 [ 190, %for.body.lr.ph ], [ %inc, %for.body ]
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%arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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store i32 %count.09, i32* %arrayidx2, align 4
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%inc = add nsw i32 %count.09, 1
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %N
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br i1 %exitcond, label %for.body, label %for.end
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for.end:
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ret void
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}
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; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=2 -instcombine -S | FileCheck %s --check-prefix=IND
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; Make sure we remove unneeded vectorization of induction variables.
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; In order for instcombine to cleanup the vectorized induction variables that we
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; create in the loop vectorizer we need to perform some form of redundancy
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; elimination to get rid of multiple uses.
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; IND-LABEL: scalar_use
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; IND: br label %vector.body
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; IND: vector.body:
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; Vectorized induction variable.
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; IND-NOT: insertelement <2 x i64>
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; IND-NOT: shufflevector <2 x i64>
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; IND: br {{.*}}, label %vector.body
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define void @scalar_use(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) {
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entry:
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br label %for.body
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for.body:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
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%ind.sum = add i64 %iv, %offset
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%arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum
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%l1 = load float, float* %arr.idx, align 4
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%ind.sum2 = add i64 %iv, %offset2
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%arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2
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%l2 = load float, float* %arr.idx2, align 4
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%m = fmul fast float %b, %l2
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%ad = fadd fast float %l1, %m
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store float %ad, float* %arr.idx, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond = icmp eq i64 %iv.next, %n
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br i1 %exitcond, label %loopexit, label %for.body
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loopexit:
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ret void
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}
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; Make sure that the loop exit count computation does not overflow for i8 and
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; i16. The exit count of these loops is i8/i16 max + 1. If we don't cast the
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; induction variable to a bigger type the exit count computation will overflow
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; to 0.
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; PR17532
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; CHECK-LABEL: i8_loop
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; CHECK: icmp eq i32 {{.*}}, 256
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define i32 @i8_loop() nounwind readnone ssp uwtable {
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br label %1
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; <label>:1 ; preds = %1, %0
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%a.0 = phi i32 [ 1, %0 ], [ %2, %1 ]
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%b.0 = phi i8 [ 0, %0 ], [ %3, %1 ]
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%2 = and i32 %a.0, 4
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%3 = add i8 %b.0, -1
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%4 = icmp eq i8 %3, 0
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br i1 %4, label %5, label %1
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; <label>:5 ; preds = %1
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ret i32 %2
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}
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; CHECK-LABEL: i16_loop
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; CHECK: icmp eq i32 {{.*}}, 65536
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define i32 @i16_loop() nounwind readnone ssp uwtable {
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br label %1
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; <label>:1 ; preds = %1, %0
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%a.0 = phi i32 [ 1, %0 ], [ %2, %1 ]
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%b.0 = phi i16 [ 0, %0 ], [ %3, %1 ]
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%2 = and i32 %a.0, 4
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%3 = add i16 %b.0, -1
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%4 = icmp eq i16 %3, 0
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br i1 %4, label %5, label %1
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; <label>:5 ; preds = %1
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ret i32 %2
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}
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; This loop has a backedge taken count of i32_max. We need to check for this
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; condition and branch directly to the scalar loop.
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; CHECK-LABEL: max_i32_backedgetaken
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; CHECK: br i1 true, label %scalar.ph, label %min.iters.checked
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; CHECK: scalar.ph:
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; CHECK: %bc.resume.val = phi i32 [ 0, %middle.block ], [ 0, %0 ]
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; CHECK: %bc.merge.rdx = phi i32 [ 1, %0 ], [ 1, %min.iters.checked ], [ %5, %middle.block ]
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define i32 @max_i32_backedgetaken() nounwind readnone ssp uwtable {
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br label %1
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; <label>:1 ; preds = %1, %0
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%a.0 = phi i32 [ 1, %0 ], [ %2, %1 ]
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%b.0 = phi i32 [ 0, %0 ], [ %3, %1 ]
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%2 = and i32 %a.0, 4
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%3 = add i32 %b.0, -1
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%4 = icmp eq i32 %3, 0
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br i1 %4, label %5, label %1
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; <label>:5 ; preds = %1
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ret i32 %2
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}
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; When generating the overflow check we must sure that the induction start value
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; is defined before the branch to the scalar preheader.
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; CHECK-LABEL: testoverflowcheck
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; CHECK: entry
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; CHECK: %[[LOAD:.*]] = load i8
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; CHECK: br
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; CHECK: scalar.ph
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; CHECK: phi i8 [ %{{.*}}, %middle.block ], [ %[[LOAD]], %entry ]
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@e = global i8 1, align 1
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@d = common global i32 0, align 4
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@c = common global i32 0, align 4
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define i32 @testoverflowcheck() {
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entry:
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%.pr.i = load i8, i8* @e, align 1
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%0 = load i32, i32* @d, align 4
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%c.promoted.i = load i32, i32* @c, align 4
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br label %cond.end.i
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cond.end.i:
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%inc4.i = phi i8 [ %.pr.i, %entry ], [ %inc.i, %cond.end.i ]
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%and3.i = phi i32 [ %c.promoted.i, %entry ], [ %and.i, %cond.end.i ]
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%and.i = and i32 %0, %and3.i
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%inc.i = add i8 %inc4.i, 1
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%tobool.i = icmp eq i8 %inc.i, 0
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br i1 %tobool.i, label %loopexit, label %cond.end.i
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loopexit:
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ret i32 %and.i
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}
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