1; RUN: opt %loadNPMPolly -polly-stmt-granularity=bb "-passes=scop(print<polly-simplify>)" -disable-output -aa-pipeline=basic-aa < %s | FileCheck %s -match-full-lines 2; 3; Remove a dead value write/read pair 4; (accesses that are effectively not used) 5; 6; for (int j = 0; j < n; j += 1) { 7; body: 8; double val = 12.5 + 12.5; 9; 10; body_succ: 11; double unused = val + 21.0; 12; A[0] = 42.0; 13; } 14; 15define void @func(i32 %n, ptr noalias nonnull %A) { 16entry: 17 br label %for 18 19for: 20 %j = phi i32 [0, %entry], [%j.inc, %inc] 21 %j.cmp = icmp slt i32 %j, %n 22 br i1 %j.cmp, label %body, label %exit 23 24 body: 25 %val = fadd double 12.5, 12.5 26 br label %body_succ 27 28 body_succ: 29 %unused = fadd double %val, 21.0 30 store double 42.0, ptr %A 31 br label %inc 32 33inc: 34 %j.inc = add nuw nsw i32 %j, 1 35 br label %for 36 37exit: 38 br label %return 39 40return: 41 ret void 42} 43 44 45; CHECK: Statistics { 46; CHECK: Dead accesses removed: 2 47; CHECK: Dead instructions removed: 2 48; CHECK: Stmts removed: 1 49; CHECK: } 50 51; CHECK: After accesses { 52; CHECK-NEXT: Stmt_body_succ 53; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0] 54; CHECK-NEXT: [n] -> { Stmt_body_succ[i0] -> MemRef_A[0] }; 55; CHECK-NEXT: } 56