The first hunk corrects a bug when printing undef null values. We would print
0->field, which is illegal. Now we print ((foo*)0)->field.
The second hunk is an optimization to not print undefined phi values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17094 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index bc3f839..96eb684 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -523,7 +523,9 @@
abort();
}
} else if (isa<UndefValue>(CPV) && CPV->getType()->isFirstClassType()) {
- Out << "0";
+ Out << "((";
+ printType(Out, CPV->getType());
+ Out << ")/*UNDEF*/0)";
return;
}
@@ -1234,11 +1236,14 @@
SI != E; ++SI)
for (BasicBlock::iterator I = SI->begin(); isa<PHINode>(I); ++I) {
PHINode *PN = cast<PHINode>(I);
- // now we have to do the printing
- Out << std::string(Indent, ' ');
- Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
- writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBlock)));
- Out << "; /* for PHI node */\n";
+ // Now we have to do the printing.
+ Value *IV = PN->getIncomingValueForBlock(CurBlock);
+ if (!isa<UndefValue>(IV)) {
+ Out << std::string(Indent, ' ');
+ Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
+ writeOperand(IV);
+ Out << "; /* for PHI node */\n";
+ }
}
}