derek.holloway
7502bf64a4
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34 lines
983 B
LLVM
34 lines
983 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=loop-unroll -unroll-threshold=300 -S < %s | FileCheck %s
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; This test caused a compile-time explosion in ValueTracking
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; because we cloned the assume value and call greatly and
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; then spent far too long analyzing those.
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define void @PR49171(i32 %arg) {
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; CHECK-LABEL: @PR49171(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[ASSUME:%.*]] = icmp eq i32 0, [[ARG:%.*]]
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; CHECK-NEXT: call void @llvm.assume(i1 [[ASSUME]])
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.inc, %loop ]
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%iv2 = phi i32 [ 0, %entry ], [ %arg, %loop ]
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%assume = icmp eq i32 %iv2, %arg
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call void @llvm.assume(i1 %assume)
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%iv.inc = add nuw nsw i32 %iv, 1
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%exitcond = icmp eq i32 %iv.inc, 50 ; Increase me!
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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declare void @llvm.assume(i1)
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