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1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py2; RUN: opt -S -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s3 4; The obvious case.5define i32 @mul(i32 %val) nounwind {6; CHECK-LABEL: 'mul'7; CHECK-NEXT: Classifying expressions for: @mul8; CHECK-NEXT: %tmp1 = mul i32 %val, 169; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633)10; CHECK-NEXT: %tmp2 = udiv i32 %tmp1, 1611; CHECK-NEXT: --> ((16 * %val) /u 16) U: [0,268435456) S: [0,268435456)12; CHECK-NEXT: Determining loop execution counts for: @mul13;14 %tmp1 = mul i32 %val, 1615 %tmp2 = udiv i32 %tmp1, 1616 ret i32 %tmp217}18 19; Or, it could be any number of equivalent patterns with mask:20; a) x & (1 << nbits) - 121; b) x & ~(-1 << nbits)22; c) x & (-1 >> (32 - y))23; d) x << (32 - y) >> (32 - y)24 25define i32 @mask_abc(i32 %val) nounwind {26; CHECK-LABEL: 'mask_abc'27; CHECK-NEXT: Classifying expressions for: @mask_abc28; CHECK-NEXT: %masked = and i32 %val, 1529; CHECK-NEXT: --> (zext i4 (trunc i32 %val to i4) to i32) U: [0,16) S: [0,16)30; CHECK-NEXT: Determining loop execution counts for: @mask_abc31;32 %masked = and i32 %val, 1533 ret i32 %masked34}35 36define i32 @mask_d(i32 %val) nounwind {37; CHECK-LABEL: 'mask_d'38; CHECK-NEXT: Classifying expressions for: @mask_d39; CHECK-NEXT: %highbitscleared = shl i32 %val, 440; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633)41; CHECK-NEXT: %masked = lshr i32 %highbitscleared, 442; CHECK-NEXT: --> ((16 * %val) /u 16) U: [0,268435456) S: [0,268435456)43; CHECK-NEXT: Determining loop execution counts for: @mask_d44;45 %highbitscleared = shl i32 %val, 446 %masked = lshr i32 %highbitscleared, 447 ret i32 %masked48}49