Propagate exit conditions as described in the PET paper
At some point we build loop trip counts using this method. It was replaced by a simpler trick that works only for affine (e.g., not modulo) constraints and relies on the removal of unbounded parts. In order to allow modulo constrains again we go back to the former, more accurate method. llvm-svn: 247540
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@ -796,10 +796,10 @@ static std::pair<__isl_give isl_set *, __isl_give isl_set *>
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partitionSetParts(__isl_take isl_set *S, unsigned Dim) {
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for (unsigned u = 0, e = isl_set_n_dim(S); u < e; u++)
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S = isl_set_lower_bound_si(S, isl_dim_set, u, 0);
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S = isl_set_lower_bound_si(S, isl_dim_set, u, u == Dim ? -1 : 0);
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unsigned NumDimsS = isl_set_n_dim(S);
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isl_set *OnlyDimS = isl_set_copy(S);
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isl_set *OnlyDimS = S;
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// Remove dimensions that are greater than Dim as they are not interesting.
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assert(NumDimsS >= Dim + 1);
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@ -827,7 +827,7 @@ partitionSetParts(__isl_take isl_set *S, unsigned Dim) {
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// Remove the artificial upper bound parameters again.
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BoundedParts = isl_set_remove_dims(BoundedParts, isl_dim_param, 0, Dim);
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isl_set *UnboundedParts = isl_set_subtract(S, isl_set_copy(BoundedParts));
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isl_set *UnboundedParts = isl_set_complement(isl_set_copy(BoundedParts));
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return std::make_pair(UnboundedParts, BoundedParts);
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}
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@ -1863,19 +1863,30 @@ void Scop::addLoopBoundsToHeaderDomains(LoopInfo &LI, ScopDetection &SD,
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isl_set_project_out(BackedgeCondition, isl_dim_set, LoopDepth + 1,
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LatchLoopDepth - LoopDepth);
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auto Parts = partitionSetParts(BackedgeCondition, LoopDepth);
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isl_map *ForwardMap = isl_map_lex_le(isl_set_get_space(HeaderBBDom));
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for (int i = 0; i < LoopDepth; i++)
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ForwardMap = isl_map_equate(ForwardMap, isl_dim_in, i, isl_dim_out, i);
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isl_set *BackedgeConditionComplement =
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isl_set_complement(BackedgeCondition);
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BackedgeConditionComplement = isl_set_lower_bound_si(
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BackedgeConditionComplement, isl_dim_set, LoopDepth, 0);
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BackedgeConditionComplement =
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isl_set_apply(BackedgeConditionComplement, ForwardMap);
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HeaderBBDom = isl_set_subtract(HeaderBBDom, BackedgeConditionComplement);
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auto Parts = partitionSetParts(HeaderBBDom, LoopDepth);
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// If a loop has an unbounded back edge condition part (here Parts.first)
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// we do not want to assume the header will even be executed for the first
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// iteration of an execution that will lead to an infinite loop. While it
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// would not be wrong to do so, it does not seem helpful.
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// TODO: Use the unbounded part to build runtime assumptions.
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FirstIteration = isl_set_subtract(FirstIteration, Parts.first);
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BackedgeCondition = isl_set_apply(Parts.second, NextIterationMap);
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BackedgeCondition = isl_set_union(BackedgeCondition, FirstIteration);
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BackedgeCondition = isl_set_coalesce(BackedgeCondition);
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HeaderBBDom = isl_set_apply(Parts.second, NextIterationMap);
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HeaderBBDom = isl_set_coalesce(isl_set_union(HeaderBBDom, FirstIteration));
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HeaderBBDom = isl_set_intersect(HeaderBBDom, BackedgeCondition);
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}
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}
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@ -7,10 +7,11 @@
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; but %call is a parameter of the SCoP and we need to make sure its value is
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; properly forwarded to the subfunction.
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; AST: Stmt_for_body(0);
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; AST: #pragma omp parallel for
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; AST: for (int c0 = 1; c0 < cols; c0 += 1)
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; AST: for (int c0 = 0; c0 < cols; c0 += 1)
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; AST: Stmt_for_body(c0);
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; AST: if (cols <= 0)
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; AST: Stmt_for_body(0);
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; IR: @foo_polly_subfn
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@ -38,10 +39,11 @@ end:
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; Another variation of this test case, now with even more of the index
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; expression defined outside of the scop.
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; AST: Stmt_for_body(0);
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; AST: #pragma omp parallel for
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; AST: for (int c0 = 1; c0 < cols; c0 += 1)
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; AST: for (int c0 = 0; c0 < cols; c0 += 1)
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; AST: Stmt_for_body(c0);
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; AST: if (cols <= 0)
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; AST: Stmt_for_body(0);
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; IR: @bar_polly_subfn
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@ -6,11 +6,12 @@
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; of the scop, but does not contain the scop.
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; AST: {
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; AST-NEXT: Stmt_while_body(0);
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; AST-NEXT: #pragma simd
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; AST-NEXT: #pragma omp parallel for
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; AST-NEXT: for (int c0 = 1; c0 < p_0 + symbol; c0 += 1)
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; AST-NEXT: for (int c0 = 0; c0 < p_0 + symbol; c0 += 1)
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; AST-NEXT: Stmt_while_body(c0);
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; AST-NEXT: if (p_0 + symbol <= 0)
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; AST-NEXT: Stmt_while_body(0);
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; AST-NEXT: }
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; IR: @update_model_polly_subfn
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@ -19,23 +19,23 @@
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; CHECK-LABEL: polly.start:
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; CHECK-NEXT: store float 0.000000e+00, float* %tmp.0.phiops
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; CHECK-LABEL: polly.merge:
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; CHECK-LABEL: polly.merge2:
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; CHECK-NEXT: br label %polly.merge_new_and_old
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R1:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R1]], float* %tmp.0.s2a
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R2:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R2]], float* %tmp.0.s2a
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; CHECK-LABEL: polly.stmt.bb4: ; preds = %polly.then3
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; CHECK-LABEL: polly.stmt.bb4:
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; CHECK: %tmp[[R5:[0-9]*]]_p_scalar_ = load float, float* %scevgep, align 4, !alias.scope !0, !noalias !2
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; CHECK: %tmp.0.s2a.reload[[R3:[0-9]*]] = load float, float* %tmp.0.s2a
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; CHECK: %p_tmp[[R4:[0-9]*]] = fadd float %tmp.0.s2a.reload[[R3]], %tmp[[R5]]_p_scalar_
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; CHECK: store float %p_tmp[[R4]], float* %tmp.0.phiops
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R2:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R2]], float* %tmp.0.s2a
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define void @f(float* %A, i32 %N) {
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@ -12,13 +12,13 @@
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; }
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; CHECK-LABEL: polly.merge_new_and_old:
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; CHECK-NEXT: %tmp.0.merge = phi float [ %tmp.0.final_reload, %polly.merge ], [ %tmp.0, %bb8 ]
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; CHECK-NEXT: %tmp.0.merge = phi float [ %tmp.0.final_reload, %polly.merge2 ], [ %tmp.0, %bb8 ]
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; CHECK-NEXT: br label %exit
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; CHECK-LABEL: polly.start:
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; CHECK-NEXT: store float 0.000000e+00, float* %tmp.0.phiops
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; CHECK-LABEL: polly.merge:
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; CHECK-LABEL: polly.merge2:
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; CHECK-NEXT: %tmp.0.final_reload = load float, float* %tmp.0.s2a
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; CHECK-NEXT: br label %polly.merge_new_and_old
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@ -26,16 +26,16 @@
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; CHECK-NEXT: %tmp.0.phiops.reload[[R1:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK-: store float %tmp.0.phiops.reload[[R1]], float* %tmp.0.s2a
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R2:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R2]], float* %tmp.0.s2a
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; CHECK-LABEL: polly.stmt.bb4: ; preds = %polly.then3
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; CHECK-LABEL: polly.stmt.bb4:
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; CHECK: %tmp[[R5:[0-9]*]]_p_scalar_ = load float, float* %scevgep, align 4, !alias.scope !0, !noalias !2
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; CHECK: %tmp.0.s2a.reload[[R3:[0-9]*]] = load float, float* %tmp.0.s2a
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; CHECK: %p_tmp[[R4:[0-9]*]] = fadd float %tmp.0.s2a.reload[[R3]], %tmp[[R5]]_p_scalar_
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; CHECK: store float %p_tmp[[R4]], float* %tmp.0.phiops
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; CHECK-LABEL: polly.stmt.bb1{{[0-9]*}}:
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; CHECK-NEXT: %tmp.0.phiops.reload[[R2:[0-9]*]] = load float, float* %tmp.0.phiops
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; CHECK: store float %tmp.0.phiops.reload[[R2]], float* %tmp.0.s2a
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define float @f(float* %A, i32 %N) {
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@ -24,13 +24,13 @@ entry:
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br label %for.cond
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; CHECK-LABEL: polly.merge_new_and_old:
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; CHECK: %x.addr.0.merge = phi i32 [ %x.addr.0.final_reload, %polly.merge ], [ %x.addr.0, %for.cond ]
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; CHECK: %x.addr.0.merge = phi i32 [ %x.addr.0.final_reload, %polly.merge21 ], [ %x.addr.0, %for.cond ]
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; CHECK: ret i32 %x.addr.0.merge
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; CHECK-LABEL: polly.start:
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; CHECK-NEXT: store i32 %x, i32* %x.addr.0.phiops
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; CHECK-LABEL: polly.merge:
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; CHECK-LABEL: polly.merge21:
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; CHECK: %x.addr.0.final_reload = load i32, i32* %x.addr.0.s2a
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for.cond: ; preds = %for.inc5, %entry
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@ -42,10 +42,6 @@ for.cond: ; preds = %for.inc5, %entry
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%cmp = icmp slt i64 %indvars.iv, %tmp
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br i1 %cmp, label %for.body, label %for.end7
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; CHECK-LABEL: polly.stmt.for.cond{{[0-9]*}}:
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; CHECK: %x.addr.0.phiops.reload[[R1:[0-9]*]] = load i32, i32* %x.addr.0.phiops
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; CHECK: store i32 %x.addr.0.phiops.reload[[R1]], i32* %x.addr.0.s2a
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for.body: ; preds = %for.cond
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; CHECK-LABEL: polly.stmt.for.body:
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; CHECK: %x.addr.0.s2a.reload[[R2:[0-9]*]] = load i32, i32* %x.addr.0.s2a
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@ -4,10 +4,10 @@
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; hence modulo handling has been disabled completely. Once this is
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; resolved this test should work again. Until then we approximate the
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; whole loop body.
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; CHECK: Stmt_for_body__TO__if_end
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;
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; CHECK: Domain :=
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; CHECK: { Stmt_for_body__TO__if_end[i0] : i0 <= 15 and i0 >= 0 };
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;
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;
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; void foo(float *A) {
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; for (long i = 0; i < 16; i++) {
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@ -1,6 +1,6 @@
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; RUN: opt %loadPolly -polly-detect-unprofitable -polly-allow-non-scev-backedge-taken-count -polly-scops -analyze < %s | FileCheck %s
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;
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; CHECK: [M, N] -> { Stmt_while_body[i0] : i0 >= 1 and 4i0 <= -M + N; Stmt_while_body[0] }
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; CHECK: [M, N] -> { Stmt_while_body[i0] : i0 >= 0 and 4i0 <= -M + N; Stmt_while_body[0] : N <= -1 + M }
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;
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; void f(int *A, int N, int M) {
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; int i = 0;
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@ -55,7 +55,7 @@ return: ; preds = %bb3, %entry
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; CHECK: Stmt_bb1
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; CHECK: Domain :=
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; CHECK: [N, M] -> { Stmt_bb1[i0, i1] :
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; CHECK-DAG: i0 >= 1
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; CHECK-DAG: i0 >= 0
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; CHECK-DAG: and
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; CHECK-DAG: i0 <= 2 + 4N + 7M
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; CHECK-DAG: and
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; CHECK-DAG: and
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; CHECK-DAG: i1 <= 1 + 5N - i0
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; CHECK-DAG: Stmt_bb1[0, i1] :
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; CHECK-DAG: 7M <= -3 - 4N
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; CHECK-DAG: and
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; CHECK-DAG: i1 >= 0
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; CHECK-DAG: and
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; CHECK-DAG: i1 <= 1 + 5N
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@ -1,7 +1,7 @@
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; RUN: opt %loadPolly -polly-scops -polly-detect-unprofitable -analyze < %s | FileCheck %s
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;
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; CHECK: Domain :=
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; CHECK: [N, P, Q] -> { Stmt_if_end[i0] : (i0 >= 2 + P and i0 >= 1 and i0 <= 1 + Q and i0 <= -1 + N) or (i0 >= 1 and i0 <= 1 + Q and i0 <= -1 + P and i0 <= -1 + N); Stmt_if_end[0] : (N >= 1 and P <= -1) or (N >= 1 and P >= 1) };
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; CHECK: [N, P, Q] -> { Stmt_if_end[i0] : (i0 >= 0 and i0 <= 1 + Q and i0 <= -1 + P and i0 <= -1 + N) or (P <= -1 and i0 >= 1 + P - Q and i0 >= 0 and i0 <= 1 + Q and i0 <= -1 + N); Stmt_if_end[0] : (N >= 1 and P <= -2 and Q <= -2) or (N >= 1 and P >= 1 and Q <= -2) or (P = -1 and N >= 1) }
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;
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; void f(int *A, int N, int P, int Q) {
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; for (int i = 0; i < N; i++) {
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