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1; RUN: opt %loadNPMPolly -polly-stmt-granularity=bb '-passes=polly-custom<delicm>' -polly-print-delicm -disable-output < %s | FileCheck %s -match-full-lines2;3; Reduction over parametric number of elements and a loopguard if the4; reduction loop is not executed at all.5; Reduction variable promoted to register.6;7; void func(double *A) {8; for (int j = 0; j < 2; j += 1) { /* outer */9; double phi = A[j];10; for (int i = 0; i < n; i += 1) /* reduction */11; phi += 4.2;12; A[j] = phi;13; }14; }15;16define void @func(i32 %n, ptr noalias nonnull %A) {17entry:18 br label %outer.preheader19 20outer.preheader:21 br label %outer.for22 23outer.for:24 %j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]25 %j.cmp = icmp slt i32 %j, 226 br i1 %j.cmp, label %reduction.guard, label %outer.exit27 28 29 reduction.guard:30 %A_idx = getelementptr inbounds double, ptr %A, i32 %j31 %init = load double, ptr %A_idx32 %guard.cmp = icmp sle i32 %n,033 br i1 %guard.cmp, label %reduction.exit, label %reduction.for34 35 reduction.for:36 %i = phi i32 [0, %reduction.guard], [%i.inc, %reduction.inc]37 %phi = phi double [%init, %reduction.guard], [%add, %reduction.inc]38 br label %body39 40 41 42 body:43 %add = fadd double %phi, 4.244 br label %reduction.inc45 46 47 48 reduction.inc:49 %i.inc = add nuw nsw i32 %i, 150 %i.cmp = icmp slt i32 %i.inc, %n51 br i1 %i.cmp, label %reduction.for, label %reduction.exit52 53 reduction.exit:54 %result = phi double [%init, %reduction.guard], [%add, %reduction.inc]55 store double %result, ptr %A_idx56 br label %outer.inc57 58 59 60outer.inc:61 %j.inc = add nuw nsw i32 %j, 162 br label %outer.for63 64outer.exit:65 br label %return66 67return:68 ret void69}70 71 72; CHECK: Statistics {73; CHECK: Compatible overwrites: 174; CHECK: Overwrites mapped to: 175; CHECK: Value scalars mapped: 276; CHECK: PHI scalars mapped: 277; CHECK: }78 79; CHECK: After accesses {80; CHECK-NEXT: Stmt_reduction_guard81; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]82; CHECK-NEXT: [n] -> { Stmt_reduction_guard[i0] -> MemRef_A[i0] };83; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]84; CHECK-NEXT: [n] -> { Stmt_reduction_guard[i0] -> MemRef_phi__phi[] };85; CHECK-NEXT: new: [n] -> { Stmt_reduction_guard[i0] -> MemRef_A[i0] : n > 0 };86; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]87; CHECK-NEXT: [n] -> { Stmt_reduction_guard[i0] -> MemRef_result__phi[] };88; CHECK-NEXT: new: [n] -> { Stmt_reduction_guard[i0] -> MemRef_A[i0] : n <= 0 };89; CHECK-NEXT: Stmt_reduction_for90; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]91; CHECK-NEXT: [n] -> { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };92; CHECK-NEXT: new: [n] -> { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };93; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]94; CHECK-NEXT: [n] -> { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };95; CHECK-NEXT: new: [n] -> { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };96; CHECK-NEXT: Stmt_body97; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]98; CHECK-NEXT: [n] -> { Stmt_body[i0, i1] -> MemRef_add[] };99; CHECK-NEXT: new: [n] -> { Stmt_body[i0, i1] -> MemRef_A[i0] };100; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]101; CHECK-NEXT: [n] -> { Stmt_body[i0, i1] -> MemRef_phi[] };102; CHECK-NEXT: new: [n] -> { Stmt_body[i0, i1] -> MemRef_A[i0] };103; CHECK-NEXT: Stmt_reduction_inc104; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]105; CHECK-NEXT: [n] -> { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };106; CHECK-NEXT: new: [n] -> { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] };107; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]108; CHECK-NEXT: [n] -> { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };109; CHECK-NEXT: new: [n] -> { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : i1 <= -2 + n };110; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]111; CHECK-NEXT: [n] -> { Stmt_reduction_inc[i0, i1] -> MemRef_result__phi[] };112; CHECK-NEXT: new: [n] -> { Stmt_reduction_inc[i0, -1 + n] -> MemRef_A[i0] };113; CHECK-NEXT: Stmt_reduction_exit114; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]115; CHECK-NEXT: [n] -> { Stmt_reduction_exit[i0] -> MemRef_result__phi[] };116; CHECK-NEXT: new: [n] -> { Stmt_reduction_exit[i0] -> MemRef_A[i0] };117; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]118; CHECK-NEXT: [n] -> { Stmt_reduction_exit[i0] -> MemRef_A[i0] };119; CHECK-NEXT: }120