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513fae2db5
of the comparison is defined inside the loop. This fixes a use-before-def problem, because the transformation puts a use of the RHS outside the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72149 91177308-0d34-0410-b5e6-96231b3b80d8
22 lines
531 B
LLVM
22 lines
531 B
LLVM
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis \
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; RUN: | grep {icmp eq i2 %lsr.iv.next, %xmp4344}
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; Don't reverse the iteration if the rhs of the compare is defined
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; inside the loop.
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define void @Fill_Buffer() nounwind {
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entry:
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br label %bb8
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bb8:
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%indvar34 = phi i32 [ 0, %entry ], [ %indvar.next35, %bb8 ]
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%indvar3451 = trunc i32 %indvar34 to i2
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%xmp4344 = xor i2 0, -1
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%xmp104 = icmp eq i2 %indvar3451, %xmp4344
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%indvar.next35 = add i32 %indvar34, 1
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br i1 %xmp104, label %bb10, label %bb8
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bb10:
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unreachable
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}
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