derek.holloway
7502bf64a4
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51 lines
2.6 KiB
LLVM
51 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -disable-output -passes='print<scalar-evolution>' < %s 2>&1 | FileCheck %s
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; %srem should have exit value 130.
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define i32 @test() {
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; CHECK-LABEL: 'test'
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; CHECK-NEXT: Classifying expressions for: @test
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; CHECK-NEXT: %phi = phi i32 [ -173, %bb ], [ %sub, %loop ]
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; CHECK-NEXT: --> %phi U: [-256,256) S: [-256,256) Exits: -173 LoopDispositions: { %loop: Variant }
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; CHECK-NEXT: %iv2 = phi i32 [ 1, %bb ], [ %iv2.inc, %loop ]
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,2) S: [1,2) Exits: 1 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %srem = srem i32 729259140, %phi
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; CHECK-NEXT: --> %srem U: [0,1073741824) S: [0,1073741824) Exits: 130 LoopDispositions: { %loop: Variant }
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; CHECK-NEXT: %trunc = trunc i32 %iv2 to i8
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; CHECK-NEXT: --> {1,+,1}<%loop> U: [1,2) S: [1,2) Exits: 1 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %urem = urem i8 -83, %trunc
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; CHECK-NEXT: --> (-83 + ((-83 /u {1,+,1}<%loop>) * {-1,+,-1}<%loop>)) U: [0,1) S: [0,1) Exits: 0 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %zext = zext i8 %urem to i32
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; CHECK-NEXT: --> (zext i8 (-83 + ((-83 /u {1,+,1}<%loop>) * {-1,+,-1}<%loop>)) to i32) U: [0,1) S: [0,1) Exits: 0 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %sub = sub i32 0, %zext
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; CHECK-NEXT: --> (-1 * (zext i8 (-83 + ((-83 /u {1,+,1}<%loop>) * {-1,+,-1}<%loop>)) to i32))<nuw><nsw> U: [0,1) S: [0,1) Exits: 0 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %iv2.inc = add i32 %iv2, 1
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; CHECK-NEXT: --> {2,+,1}<nuw><nsw><%loop> U: [2,3) S: [2,3) Exits: 2 LoopDispositions: { %loop: Computable }
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; CHECK-NEXT: %srem.lcssa = phi i32 [ %srem, %loop ]
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; CHECK-NEXT: --> %srem U: [0,1073741824) S: [0,1073741824) --> 130 U: [130,131) S: [130,131)
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; CHECK-NEXT: Determining loop execution counts for: @test
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; CHECK-NEXT: Loop %loop: backedge-taken count is i32 0
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 0
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is i32 0
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; CHECK-NEXT: Loop %loop: Trip multiple is 1
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;
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bb:
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br label %loop
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loop:
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%phi = phi i32 [ -173, %bb ], [ %sub, %loop ]
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%iv2 = phi i32 [ 1, %bb ], [ %iv2.inc, %loop ]
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%srem = srem i32 729259140, %phi
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%trunc = trunc i32 %iv2 to i8
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%urem = urem i8 -83, %trunc
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%zext = zext i8 %urem to i32
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%sub = sub i32 0, %zext
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%iv2.inc = add i32 %iv2, 1
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%icmp = icmp eq i32 %zext, 0
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br i1 %icmp, label %exit, label %loop
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exit:
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%srem.lcssa = phi i32 [ %srem, %loop ]
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ret i32 %srem.lcssa
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}
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