a2eebb828e
Summary: Teach SimpleLoopUnswitch to preserve MemorySSA. Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits Differential Revision: https://reviews.llvm.org/D47022 llvm-svn: 348263
30 lines
945 B
LLVM
30 lines
945 B
LLVM
; RUN: opt -simple-loop-unswitch -disable-output < %s
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; RUN: opt -simple-loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output < %s
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; PR10031
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define i32 @test(i32 %command) {
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entry:
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br label %tailrecurse
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tailrecurse: ; preds = %if.then14, %tailrecurse, %entry
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br i1 undef, label %if.then, label %tailrecurse
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if.then: ; preds = %tailrecurse
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switch i32 %command, label %sw.bb [
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i32 2, label %land.lhs.true
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i32 0, label %land.lhs.true
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]
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land.lhs.true: ; preds = %if.then, %if.then
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br i1 undef, label %sw.bb, label %if.then14
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if.then14: ; preds = %land.lhs.true
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switch i32 %command, label %tailrecurse [
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i32 0, label %sw.bb
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i32 1, label %sw.bb
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]
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sw.bb: ; preds = %if.then14
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unreachable
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}
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