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Don't attempt MTM heuristics without a scheduling model present.

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This should fix the PPC buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178558 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-04-02 18:26:45 +00:00
parent 8396e13042
commit 423d674412
2 changed files with 6 additions and 0 deletions
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4
lib/CodeGen/EarlyIfConversion.cpp
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@ -677,6 +677,10 @@ bool EarlyIfConverter::shouldConvertIf() {
if (Stress)
return true;
// Without a scheduling model, we can't make decisions.
if (!SchedModel->hasInstrSchedModel())
return false;
if (!MinInstr)
MinInstr = Traces->getEnsemble(MachineTraceMetrics::TS_MinInstrCount);

2
test/CodeGen/X86/early-ifcvt-crash.ll
View File

@ -1,5 +1,7 @@
; RUN: llc < %s -x86-early-ifcvt -verify-machineinstrs
; RUN: llc < %s -x86-early-ifcvt -stress-early-ifcvt -verify-machineinstrs
; CPU without a scheduling model:
; RUN: llc < %s -x86-early-ifcvt -mcpu=pentium3 -verify-machineinstrs
;
; Run these tests with and without -stress-early-ifcvt to exercise heuristics.
;