1 ; RUN: opt < %s -analyze -scalar-evolution -scalar-evolution-max-iterations=0 | FileCheck %s 2 ; PR1101 3 4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5 target triple = "x86_64-unknown-linux-gnu" 6 7 @A = weak global [1000 x i32] zeroinitializer, align 32 8 9 ; CHECK: Printing analysis 'Scalar Evolution Analysis' for function 'test1': 10 ; CHECK: backedge-taken count is 10000 11 12 define void @test1(i32 %N) { 13 entry: 14 br label %bb3 15 16 bb: ; preds = %bb3 17 %tmp = getelementptr [1000 x i32], [1000 x i32]* @A, i32 0, i32 %i.0 ; <i32*> [#uses=1] 18 store i32 123, i32* %tmp 19 %tmp2 = add i32 %i.0, 1 ; <i32> [#uses=1] 20 br label %bb3 21 22 bb3: ; preds = %bb, %entry 23 %i.0 = phi i32 [ 0, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=3] 24 %tmp3 = icmp sle i32 %i.0, 9999 ; <i1> [#uses=1] 25 br i1 %tmp3, label %bb, label %bb5 26 27 bb5: ; preds = %bb3 28 br label %return 29 30 return: ; preds = %bb5 31 ret void 32 } 33 34 ; PR22795 35 ; CHECK: Printing analysis 'Scalar Evolution Analysis' for function 'test2': 36 ; CHECK: %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ] 37 ; CHECK-NEXT: --> {-1,+,2}<%preheader> U: full-set S: full-set Exits: 13 38 39 define i32 @test2() { 40 entry: 41 %bins = alloca [16 x i64], align 16 42 %0 = bitcast [16 x i64]* %bins to i8* 43 call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 128, i32 16, i1 false) 44 br label %preheader 45 46 preheader: ; preds = %for.inc.1, %entry 47 %v11 = phi i64 [ 0, %entry ], [ %next12.1, %for.inc.1 ] 48 %iv = phi i32 [ -1, %entry ], [ %next.1, %for.inc.1 ] 49 %cmp = icmp sgt i64 %v11, 0 50 br i1 %cmp, label %for.body, label %for.inc 51 52 for.body: ; preds = %preheader 53 %zext = zext i32 %iv to i64 54 %arrayidx = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %v11 55 %loaded = load i64, i64* %arrayidx, align 8 56 %add = add i64 %loaded, 1 57 %add2 = add i64 %add, %zext 58 store i64 %add2, i64* %arrayidx, align 8 59 br label %for.inc 60 61 for.inc: ; preds = %for.body, %preheader 62 %next12 = add nuw nsw i64 %v11, 1 63 %next = add nsw i32 %iv, 1 64 br i1 true, label %for.body.1, label %for.inc.1 65 66 end: ; preds = %for.inc.1 67 %arrayidx8 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 2 68 %load = load i64, i64* %arrayidx8, align 16 69 %shr4 = lshr i64 %load, 32 70 %conv = trunc i64 %shr4 to i32 71 ret i32 %conv 72 73 for.body.1: ; preds = %for.inc 74 %zext.1 = zext i32 %next to i64 75 %arrayidx.1 = getelementptr [16 x i64], [16 x i64]* %bins, i64 0, i64 %next12 76 %loaded.1 = load i64, i64* %arrayidx.1, align 8 77 %add.1 = add i64 %loaded.1, 1 78 %add2.1 = add i64 %add.1, %zext.1 79 store i64 %add2.1, i64* %arrayidx.1, align 8 80 br label %for.inc.1 81 82 for.inc.1: ; preds = %for.body.1, %for.inc 83 %next12.1 = add nuw nsw i64 %next12, 1 84 %next.1 = add nuw nsw i32 %next, 1 85 %exitcond.1 = icmp eq i64 %next12.1, 16 86 br i1 %exitcond.1, label %end, label %preheader 87 } 88 89 ; Function Attrs: nounwind 90 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #0 91
