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1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 42; RUN: opt -S -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 < %s 2>&1 | FileCheck %s3 4define void @u_0(i8 %rhs) {5; E.g.: %rhs = 255, %start = 99, backedge taken 156 times6;7; CHECK-LABEL: 'u_0'8; CHECK-NEXT: Determining loop execution counts for: @u_09; CHECK-NEXT: Loop %loop: backedge-taken count is (-100 + (-1 * %rhs) + ((100 + %rhs) umax %rhs))10; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i8 -100, actual taken count either this or zero.11; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is (-100 + (-1 * %rhs) + ((100 + %rhs) umax %rhs)), actual taken count either this or zero.12; CHECK-NEXT: Loop %loop: Trip multiple is 113;14entry:15 %start = add i8 %rhs, 10016 br label %loop17 18loop:19 %iv = phi i8 [ %start, %entry ], [ %iv.inc, %loop ]20 %iv.inc = add nuw i8 %iv, 1 ;; Note: this never unsigned-wraps21 %iv.cmp = icmp ult i8 %iv, %rhs22 br i1 %iv.cmp, label %loop, label %leave23 24 25leave:26 ret void27}28 29define void @u_1(i8 %start) {30;31; CHECK-LABEL: 'u_1'32; CHECK-NEXT: Determining loop execution counts for: @u_133; CHECK-NEXT: Loop %loop: backedge-taken count is ((-1 * %start) + ((-100 + %start) umax %start))34; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i8 -100, actual taken count either this or zero.35; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((-1 * %start) + ((-100 + %start) umax %start)), actual taken count either this or zero.36; CHECK-NEXT: Loop %loop: Trip multiple is 137;38entry:39; E.g.: %start = 99, %rhs = 255, backedge taken 156 times40 %rhs = add i8 %start, -10041 br label %loop42 43loop:44 %iv = phi i8 [ %start, %entry ], [ %iv.inc, %loop ]45 %iv.inc = add nuw i8 %iv, 1 ;; Note: this never unsigned-wraps46 %iv.cmp = icmp ult i8 %iv, %rhs47 br i1 %iv.cmp, label %loop, label %leave48 49 50leave:51 ret void52}53 54define void @s_0(i8 %rhs) {55;56; CHECK-LABEL: 's_0'57; CHECK-NEXT: Determining loop execution counts for: @s_058; CHECK-NEXT: Loop %loop: backedge-taken count is (-100 + (-1 * %rhs) + ((100 + %rhs) smax %rhs))59; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i8 -100, actual taken count either this or zero.60; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is (-100 + (-1 * %rhs) + ((100 + %rhs) smax %rhs)), actual taken count either this or zero.61; CHECK-NEXT: Loop %loop: Trip multiple is 162;63entry:64; E.g.: %rhs = 127, %start = -29, backedge taken 156 times65 %start = add i8 %rhs, 10066 br label %loop67 68loop:69 %iv = phi i8 [ %start, %entry ], [ %iv.inc, %loop ]70 %iv.inc = add nsw i8 %iv, 1 ;; Note: this never signed-wraps71 %iv.cmp = icmp slt i8 %iv, %rhs72 br i1 %iv.cmp, label %loop, label %leave73 74 75leave:76 ret void77}78 79define void @s_1(i8 %start) {80;81; CHECK-LABEL: 's_1'82; CHECK-NEXT: Determining loop execution counts for: @s_183; CHECK-NEXT: Loop %loop: backedge-taken count is ((-1 * %start) + ((-100 + %start) smax %start))84; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i8 -100, actual taken count either this or zero.85; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((-1 * %start) + ((-100 + %start) smax %start)), actual taken count either this or zero.86; CHECK-NEXT: Loop %loop: Trip multiple is 187;88entry:89; E.g.: start = -29, %rhs = 127, %backedge taken 156 times90 %rhs = add i8 %start, -10091 br label %loop92 93loop:94 %iv = phi i8 [ %start, %entry ], [ %iv.inc, %loop ]95 %iv.inc = add nsw i8 %iv, 196 %iv.cmp = icmp slt i8 %iv, %rhs97 br i1 %iv.cmp, label %loop, label %leave98 99 100leave:101 ret void102}103 104define void @s_2(i8 %start) {105;106; CHECK-LABEL: 's_2'107; CHECK-NEXT: Determining loop execution counts for: @s_2108; CHECK-NEXT: Loop %loop: backedge-taken count is ((-1 * ((-100 + %start) smin %start)) + %start)109; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i8 -1110; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is ((-1 * ((-100 + %start) smin %start)) + %start)111; CHECK-NEXT: Loop %loop: Trip multiple is 1112;113entry:114 %rhs = add i8 %start, -100115 br label %loop116 117loop:118 %iv = phi i8 [ %start, %entry ], [ %iv.inc, %loop ]119 %iv.inc = add nsw i8 %iv, -1120 %iv.cmp = icmp sgt i8 %iv, %rhs121 br i1 %iv.cmp, label %loop, label %leave122 123 124leave:125 ret void126}127