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Fix bugs, don't do external methods which causes segv. 

llvm-svn: 1414
This commit is contained in:
Chris Lattner 2001-12-04 08:13:06 +00:00
parent 4c160c39b4
commit d23d752dc5
1 changed files with 4 additions and 1 deletions
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5
llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
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@ -127,7 +127,8 @@ static bool TransformLoop(cfg::LoopInfo *Loops, cfg::Loop *Loop) {
#ifdef DEBUG
cerr << IndVars[i];
#endif
if (IV != Cannonical) { // Don't modify the cannonical indvar
// Don't modify the cannonical indvar or unrecognized indvars...
if (IV != Cannonical && IV->InductionType != InductionVariable::Unknown) {
Instruction *Val = IterCount;
if (!isa<ConstantInt>(IV->Step) || // If the step != 1
!cast<ConstantInt>(IV->Step)->equalsInt(1)) {
@ -183,6 +184,8 @@ static bool TransformLoop(cfg::LoopInfo *Loops, cfg::Loop *Loop) {
}
bool InductionVariableSimplify::doit(Method *M) {
if (M->isExternal()) return false;
// Figure out the loop structure of the method...
cfg::LoopInfo Loops(M);