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Do not call SplitBlockPredecessors on a loop preheader when one of the predecessors is an indirectbr. Otherwise, you will hit this assert: !isa<IndirectBrInst>(Preds[i]->getTerminator()) && "Cannot split an edge from an IndirectBrInst" llvm-svn: 153134
42 lines
1.8 KiB
LLVM
42 lines
1.8 KiB
LLVM
; RUN: opt < %s -loop-simplify -S | FileCheck %s
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; Make sure the preheader exists.
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; CHECK: sw.bb103:
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; CHECK: indirectbr {{.*}}label %while.cond112
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; CHECK: while.cond112:
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; But the tail is not split.
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; CHECK: for.body:
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; CHECK: indirectbr {{.*}}label %while.cond112
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define fastcc void @build_regex_nfa() nounwind uwtable ssp {
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entry:
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indirectbr i8* blockaddress(@build_regex_nfa, %while.cond), [label %while.cond]
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while.cond: ; preds = %if.then439, %entry
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indirectbr i8* blockaddress(@build_regex_nfa, %sw.bb103), [label %do.body785, label %sw.bb103]
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sw.bb103: ; preds = %while.body
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indirectbr i8* blockaddress(@build_regex_nfa, %while.cond112), [label %while.cond112]
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while.cond112: ; preds = %for.body, %for.cond.preheader, %sw.bb103
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%pc.0 = phi i8 [ -1, %sw.bb103 ], [ 0, %for.body ], [ %pc.0, %for.cond.preheader ]
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indirectbr i8* blockaddress(@build_regex_nfa, %Lsetdone), [label %sw.bb118, label %Lsetdone]
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sw.bb118: ; preds = %while.cond112
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indirectbr i8* blockaddress(@build_regex_nfa, %for.cond.preheader), [label %Lerror.loopexit, label %for.cond.preheader]
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for.cond.preheader: ; preds = %sw.bb118
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indirectbr i8* blockaddress(@build_regex_nfa, %for.body), [label %while.cond112, label %for.body]
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for.body: ; preds = %for.body, %for.cond.preheader
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indirectbr i8* blockaddress(@build_regex_nfa, %for.body), [label %while.cond112, label %for.body]
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Lsetdone: ; preds = %while.cond112
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unreachable
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do.body785: ; preds = %while.cond, %while.body
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ret void
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Lerror.loopexit: ; preds = %sw.bb118
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unreachable
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}
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