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Block terminator may be a switch.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86761 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-11-11 00:00:21 +00:00
parent 6eb8dd2276
commit f40888dc9b
2 changed files with 131 additions and 1 deletions
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2
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -2428,7 +2428,7 @@ static bool isUsedByExitBranch(ICmpInst *Cond, Loop *L) {
if (!L->isLoopExiting(CondBB))
return false;
BranchInst *TermBr = dyn_cast<BranchInst>(CondBB->getTerminator());
if (!TermBr->isConditional())
if (!TermBr || !TermBr->isConditional())
return false;
Value *User = *Cond->use_begin();

130
test/Transforms/LoopStrengthReduce/2009-11-10-LSRCrash.ll Normal file
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@ -0,0 +1,130 @@
; RUN: llc < %s -mtriple=i386-apple-darwin11
define void @_ZN4llvm20SelectionDAGLowering14visitInlineAsmENS_8CallSiteE() nounwind ssp align 2 {
entry:
br i1 undef, label %bb3.i, label %bb4.i
bb3.i: ; preds = %entry
unreachable
bb4.i: ; preds = %entry
br i1 undef, label %bb.i.i, label %_ZNK4llvm8CallSite14getCalledValueEv.exit
bb.i.i: ; preds = %bb4.i
unreachable
_ZNK4llvm8CallSite14getCalledValueEv.exit: ; preds = %bb4.i
br i1 undef, label %_ZN4llvm4castINS_9InlineAsmEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit, label %bb6.i
bb6.i: ; preds = %_ZNK4llvm8CallSite14getCalledValueEv.exit
unreachable
_ZN4llvm4castINS_9InlineAsmEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit: ; preds = %_ZNK4llvm8CallSite14getCalledValueEv.exit
br i1 undef, label %_ZL25hasInlineAsmMemConstraintRSt6vectorIN4llvm9InlineAsm14ConstraintInfoESaIS2_EERKNS0_14TargetLoweringE.exit, label %bb.i
bb.i: ; preds = %_ZN4llvm4castINS_9InlineAsmEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit
br label %_ZL25hasInlineAsmMemConstraintRSt6vectorIN4llvm9InlineAsm14ConstraintInfoESaIS2_EERKNS0_14TargetLoweringE.exit
_ZL25hasInlineAsmMemConstraintRSt6vectorIN4llvm9InlineAsm14ConstraintInfoESaIS2_EERKNS0_14TargetLoweringE.exit: ; preds = %bb.i, %_ZN4llvm4castINS_9InlineAsmEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit
br i1 undef, label %bb50, label %bb27
bb27: ; preds = %_ZL25hasInlineAsmMemConstraintRSt6vectorIN4llvm9InlineAsm14ConstraintInfoESaIS2_EERKNS0_14TargetLoweringE.exit
br i1 undef, label %bb1.i727, label %bb.i.i726
bb.i.i726: ; preds = %bb27
unreachable
bb1.i727: ; preds = %bb27
unreachable
bb50: ; preds = %_ZL25hasInlineAsmMemConstraintRSt6vectorIN4llvm9InlineAsm14ConstraintInfoESaIS2_EERKNS0_14TargetLoweringE.exit
br label %bb107
bb51: ; preds = %bb107
br i1 undef, label %bb105, label %bb106
bb105: ; preds = %bb51
unreachable
bb106: ; preds = %bb51
br label %bb107
bb107: ; preds = %bb106, %bb50
br i1 undef, label %bb108, label %bb51
bb108: ; preds = %bb107
br i1 undef, label %bb242, label %bb114
bb114: ; preds = %bb108
br i1 undef, label %bb141, label %bb116
bb116: ; preds = %bb114
br i1 undef, label %bb120, label %bb121
bb120: ; preds = %bb116
unreachable
bb121: ; preds = %bb116
unreachable
bb141: ; preds = %bb114
br i1 undef, label %bb182, label %bb143
bb143: ; preds = %bb141
br label %bb157
bb144: ; preds = %bb.i.i.i843
switch i32 undef, label %bb155 [
i32 2, label %bb153
i32 6, label %bb153
i32 4, label %bb153
]
bb153: ; preds = %bb144, %bb144, %bb144
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
br label %bb157
bb155: ; preds = %bb144
unreachable
bb157: ; preds = %bb153, %bb143
%indvar = phi i32 [ %indvar.next, %bb153 ], [ 0, %bb143 ] ; <i32> [#uses=2]
%0 = icmp eq i32 undef, %indvar ; <i1> [#uses=1]
switch i16 undef, label %bb6.i841 [
i16 9, label %_ZN4llvm4castINS_14ConstantSDNodeENS_7SDValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS5_.exit
i16 26, label %_ZN4llvm4castINS_14ConstantSDNodeENS_7SDValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS5_.exit
]
bb6.i841: ; preds = %bb157
unreachable
_ZN4llvm4castINS_14ConstantSDNodeENS_7SDValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS5_.exit: ; preds = %bb157, %bb157
br i1 undef, label %bb.i.i.i843, label %bb1.i.i.i844
bb.i.i.i843: ; preds = %_ZN4llvm4castINS_14ConstantSDNodeENS_7SDValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS5_.exit
br i1 %0, label %bb158, label %bb144
bb1.i.i.i844: ; preds = %_ZN4llvm4castINS_14ConstantSDNodeENS_7SDValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS5_.exit
unreachable
bb158: ; preds = %bb.i.i.i843
br i1 undef, label %bb177, label %bb176
bb176: ; preds = %bb158
unreachable
bb177: ; preds = %bb158
br i1 undef, label %bb179, label %bb178
bb178: ; preds = %bb177
unreachable
bb179: ; preds = %bb177
unreachable
bb182: ; preds = %bb141
unreachable
bb242: ; preds = %bb108
unreachable
}