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75cf9cc527
partially unroll a loop when fully unrolling would not fit under the threshold. Patch by Mikael Lepistö. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54160 91177308-0d34-0410-b5e6-96231b3b80d8
16 lines
703 B
LLVM
16 lines
703 B
LLVM
; RUN: llvm-as < %s | opt -debug -loop-unroll |& grep {will not try to unroll partially because}
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; RUN: llvm-as < %s | opt -debug -loop-unroll -unroll-allow-partial |& grep {partially unrolling with count}
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; RUN: llvm-as < %s | opt -debug -loop-unroll -unroll-allow-partial -unroll-threshold=3 |& grep {could not unroll partially}
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define i32 @main() {
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entry:
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br label %no_exit
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no_exit: ; preds = %no_exit, %entry
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%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %no_exit ] ; <i32> [#uses=1]
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%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
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%exitcond = icmp ne i32 %indvar.next, 100 ; <i1> [#uses=1]
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br i1 %exitcond, label %no_exit, label %loopexit
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loopexit: ; preds = %no_exit
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ret i32 0
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}
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