derek.holloway
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69 lines
3.5 KiB
LLVM
69 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -disable-output -passes='print<scalar-evolution>' -verify-scev < %s 2>&1 | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
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target triple = "x86_64-unknown-linux-gnu"
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; print<scalar-evolution> is used to compute SCEVs for all values in the
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; function.
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; We should not crash on multiplicative inverse called within SCEV's binomial
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; coefficient function.
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define i32 @pr87798() {
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; CHECK-LABEL: 'pr87798'
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; CHECK-NEXT: Classifying expressions for: @pr87798
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; CHECK-NEXT: %phi = phi i32 [ 0, %bb ], [ %add4, %bb1 ]
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; CHECK-NEXT: --> {0,+,0,+,0,+,2,+,3}<%bb1> U: full-set S: full-set Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %phi2 = phi i32 [ 0, %bb ], [ %add, %bb1 ]
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; CHECK-NEXT: --> {0,+,0,+,1}<%bb1> U: full-set S: full-set Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %phi3 = phi i32 [ 0, %bb ], [ %add5, %bb1 ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%bb1> U: [0,1) S: [0,1) Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %add = add i32 %phi2, %phi3
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; CHECK-NEXT: --> {0,+,1,+,1}<%bb1> U: full-set S: full-set Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %mul = mul i32 %phi2, %phi3
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; CHECK-NEXT: --> {0,+,0,+,2,+,3}<%bb1> U: full-set S: full-set Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %add4 = add i32 %mul, %phi
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; CHECK-NEXT: --> {0,+,0,+,2,+,5,+,3}<%bb1> U: full-set S: full-set Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %and = and i32 %phi, 1
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; CHECK-NEXT: --> (zext i1 {false,+,false,+,false,+,false,+,true}<%bb1> to i32) U: [0,2) S: [0,2) Exits: 0 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %add5 = add i32 %phi3, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%bb1> U: [1,2) S: [1,2) Exits: 1 LoopDispositions: { %bb1: Computable }
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; CHECK-NEXT: %phi9 = phi i32 [ %and, %bb1 ]
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; CHECK-NEXT: --> (zext i1 {false,+,false,+,false,+,false,+,true}<%bb1> to i32) U: [0,2) S: [0,2) --> 0 U: [0,1) S: [0,1)
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; CHECK-NEXT: %zext = zext i32 %phi9 to i64
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; CHECK-NEXT: --> poison U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @pr87798
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; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: Loop %bb1: backedge-taken count is i1 false
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; CHECK-NEXT: Loop %bb1: constant max backedge-taken count is i1 false
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; CHECK-NEXT: Loop %bb1: symbolic max backedge-taken count is i1 false
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; CHECK-NEXT: Loop %bb1: Trip multiple is 1
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;
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bb:
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br label %bb1
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bb1: ; preds = %bb1, %bb
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%phi = phi i32 [ 0, %bb ], [ %add4, %bb1 ]
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%phi2 = phi i32 [ 0, %bb ], [ %add, %bb1 ]
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%phi3 = phi i32 [ 0, %bb ], [ %add5, %bb1 ]
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%add = add i32 %phi2, %phi3
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%mul = mul i32 %phi2, %phi3
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%add4 = add i32 %mul, %phi
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%and = and i32 %phi, 1
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%add5 = add i32 %phi3, 1
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br i1 true, label %preheader, label %bb1
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preheader: ; preds = %bb1
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%phi9 = phi i32 [ %and, %bb1 ]
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br label %loop
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loop: ; preds = %preheader, %loop
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br label %loop
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bb7: ; No predecessors!
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%zext = zext i32 %phi9 to i64
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ret i32 0
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}
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