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| author | Chris Lattner <sabre@nondot.org> | 2004-10-16 18:12:13 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2004-10-16 18:12:13 +0000 |
| commit | a9d12c0a56e60a331af3ef6209d754f0c12e8bab (patch) | |
| tree | 750c3e7c26db654e761ae86e457ba0db22a2d030 /lib/Target/CBackend | |
| parent | e87597fb75d2870505ad54480ad51452bd6c75c3 (diff) | |
| download | external_llvm-a9d12c0a56e60a331af3ef6209d754f0c12e8bab.zip external_llvm-a9d12c0a56e60a331af3ef6209d754f0c12e8bab.tar.gz external_llvm-a9d12c0a56e60a331af3ef6209d754f0c12e8bab.tar.bz2 | |
Add support for unreachable and undef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17048 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/CBackend')
| -rw-r--r-- | lib/Target/CBackend/CBackend.cpp | 12 | ||||
| -rw-r--r-- | lib/Target/CBackend/Writer.cpp | 12 |
2 files changed, 20 insertions, 4 deletions
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp index c4d8c46..bc3f839 100644 --- a/lib/Target/CBackend/CBackend.cpp +++ b/lib/Target/CBackend/CBackend.cpp @@ -174,6 +174,7 @@ namespace { void visitUnwindInst(UnwindInst &I) { assert(0 && "Lowerinvoke pass didn't work!"); } + void visitUnreachableInst(UnreachableInst &I); void visitPHINode(PHINode &I); void visitBinaryOperator(Instruction &I); @@ -521,6 +522,9 @@ void CWriter::printConstant(Constant *CPV) { << *CE << "\n"; abort(); } + } else if (isa<UndefValue>(CPV) && CPV->getType()->isFirstClassType()) { + Out << "0"; + return; } switch (CPV->getType()->getTypeID()) { @@ -606,7 +610,7 @@ void CWriter::printConstant(Constant *CPV) { } case Type::ArrayTyID: - if (isa<ConstantAggregateZero>(CPV)) { + if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) { const ArrayType *AT = cast<ArrayType>(CPV->getType()); Out << "{"; if (AT->getNumElements()) { @@ -625,7 +629,7 @@ void CWriter::printConstant(Constant *CPV) { break; case Type::StructTyID: - if (isa<ConstantAggregateZero>(CPV)) { + if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) { const StructType *ST = cast<StructType>(CPV->getType()); Out << "{"; if (ST->getNumElements()) { @@ -1205,6 +1209,10 @@ void CWriter::visitSwitchInst(SwitchInst &SI) { Out << " }\n"; } +void CWriter::visitUnreachableInst(UnreachableInst &I) { + Out << " /*UNREACHABLE*/\n"; +} + bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) { /// FIXME: This should be reenabled, but loop reordering safe!! return true; diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp index c4d8c46..bc3f839 100644 --- a/lib/Target/CBackend/Writer.cpp +++ b/lib/Target/CBackend/Writer.cpp @@ -174,6 +174,7 @@ namespace { void visitUnwindInst(UnwindInst &I) { assert(0 && "Lowerinvoke pass didn't work!"); } + void visitUnreachableInst(UnreachableInst &I); void visitPHINode(PHINode &I); void visitBinaryOperator(Instruction &I); @@ -521,6 +522,9 @@ void CWriter::printConstant(Constant *CPV) { << *CE << "\n"; abort(); } + } else if (isa<UndefValue>(CPV) && CPV->getType()->isFirstClassType()) { + Out << "0"; + return; } switch (CPV->getType()->getTypeID()) { @@ -606,7 +610,7 @@ void CWriter::printConstant(Constant *CPV) { } case Type::ArrayTyID: - if (isa<ConstantAggregateZero>(CPV)) { + if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) { const ArrayType *AT = cast<ArrayType>(CPV->getType()); Out << "{"; if (AT->getNumElements()) { @@ -625,7 +629,7 @@ void CWriter::printConstant(Constant *CPV) { break; case Type::StructTyID: - if (isa<ConstantAggregateZero>(CPV)) { + if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) { const StructType *ST = cast<StructType>(CPV->getType()); Out << "{"; if (ST->getNumElements()) { @@ -1205,6 +1209,10 @@ void CWriter::visitSwitchInst(SwitchInst &SI) { Out << " }\n"; } +void CWriter::visitUnreachableInst(UnreachableInst &I) { + Out << " /*UNREACHABLE*/\n"; +} + bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) { /// FIXME: This should be reenabled, but loop reordering safe!! return true; |