88f7dc17eb
There have been some minor but pervasive changes to the generated CHECK lines, so regenerate all of them, to minimize future diffs.
49 lines
1.7 KiB
LLVM
49 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt -S -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
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; The obvious case.
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define i32 @mul(i32 %val) nounwind {
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; CHECK-LABEL: 'mul'
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; CHECK-NEXT: Classifying expressions for: @mul
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; CHECK-NEXT: %tmp1 = mul i32 %val, 16
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; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633)
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; CHECK-NEXT: %tmp2 = udiv i32 %tmp1, 16
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; CHECK-NEXT: --> ((16 * %val) /u 16) U: [0,268435456) S: [0,268435456)
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; CHECK-NEXT: Determining loop execution counts for: @mul
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;
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%tmp1 = mul i32 %val, 16
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%tmp2 = udiv i32 %tmp1, 16
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ret i32 %tmp2
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}
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; Or, it could be any number of equivalent patterns with mask:
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; a) x & (1 << nbits) - 1
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; b) x & ~(-1 << nbits)
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; c) x & (-1 >> (32 - y))
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; d) x << (32 - y) >> (32 - y)
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define i32 @mask_abc(i32 %val) nounwind {
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; CHECK-LABEL: 'mask_abc'
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; CHECK-NEXT: Classifying expressions for: @mask_abc
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; CHECK-NEXT: %masked = and i32 %val, 15
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; CHECK-NEXT: --> (zext i4 (trunc i32 %val to i4) to i32) U: [0,16) S: [0,16)
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; CHECK-NEXT: Determining loop execution counts for: @mask_abc
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;
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%masked = and i32 %val, 15
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ret i32 %masked
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}
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define i32 @mask_d(i32 %val) nounwind {
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; CHECK-LABEL: 'mask_d'
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; CHECK-NEXT: Classifying expressions for: @mask_d
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; CHECK-NEXT: %highbitscleared = shl i32 %val, 4
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; CHECK-NEXT: --> (16 * %val) U: [0,-15) S: [-2147483648,2147483633)
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; CHECK-NEXT: %masked = lshr i32 %highbitscleared, 4
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; CHECK-NEXT: --> ((16 * %val) /u 16) U: [0,268435456) S: [0,268435456)
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; CHECK-NEXT: Determining loop execution counts for: @mask_d
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;
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%highbitscleared = shl i32 %val, 4
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%masked = lshr i32 %highbitscleared, 4
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ret i32 %masked
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}
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