34 lines
1.5 KiB
LLVM
34 lines
1.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution -scalar-evolution-classify-expressions=0 | FileCheck %s
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
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; ScalarEvolution should be able to compute a loop exit value for %indvar.i8.
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define void @another_count_down_signed(double* %d, i64 %n) nounwind {
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; CHECK-LABEL: 'another_count_down_signed'
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; CHECK-NEXT: Determining loop execution counts for: @another_count_down_signed
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; CHECK-NEXT: Loop %loop: backedge-taken count is (-11 + %n)
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; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-11 + %n)
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; CHECK-NEXT: Predicates:
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; CHECK: Loop %loop: Trip multiple is 1
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;
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entry:
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br label %loop
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loop: ; preds = %loop, %entry
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%indvar = phi i64 [ %n, %entry ], [ %indvar.next, %loop ] ; <i64> [#uses=4]
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%s0 = shl i64 %indvar, 8 ; <i64> [#uses=1]
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%indvar.i8 = ashr i64 %s0, 8 ; <i64> [#uses=1]
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%t0 = getelementptr double, double* %d, i64 %indvar.i8 ; <double*> [#uses=2]
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%t1 = load double, double* %t0 ; <double> [#uses=1]
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%t2 = fmul double %t1, 1.000000e-01 ; <double> [#uses=1]
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store double %t2, double* %t0
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%indvar.next = sub i64 %indvar, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %indvar.next, 10 ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %loop
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return: ; preds = %loop
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ret void
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}
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