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| author | Chris Lattner <sabre@nondot.org> | 2003-03-06 21:02:43 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2003-03-06 21:02:43 +0000 |
| commit | a5ae71a137b9c6f458cc6c9064be787dbc5f4311 (patch) | |
| tree | e01a18a4574a24aa78b53c25ed201d32cfcdedec /include/llvm/Constants.h | |
| parent | 27accf7692562d247a162a6762391b4c07d2c23d (diff) | |
| download | external_llvm-a5ae71a137b9c6f458cc6c9064be787dbc5f4311.zip external_llvm-a5ae71a137b9c6f458cc6c9064be787dbc5f4311.tar.gz external_llvm-a5ae71a137b9c6f458cc6c9064be787dbc5f4311.tar.bz2 | |
Extend struct and array constants to support isNullValue
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5719 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Constants.h')
| -rw-r--r-- | include/llvm/Constants.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index ec63458..6c1b8eb 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -289,7 +289,14 @@ public: /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. - virtual bool isNullValue() const { return false; } + virtual bool isNullValue() const { + // FIXME: This should be made to be MUCH faster. Just check against well + // known null value! + for (unsigned i = 0, e = getNumOperands(); i != e; ++i) + if (!cast<Constant>(getOperand(i))->isNullValue()) + return false; + return true; + } virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To); @@ -328,7 +335,14 @@ public: /// isNullValue - Return true if this is the value that would be returned by /// getNullValue. - virtual bool isNullValue() const { return false; } + virtual bool isNullValue() const { + // FIXME: This should be made to be MUCH faster. Just check against well + // known null value! + for (unsigned i = 0, e = getNumOperands(); i != e; ++i) + if (!cast<Constant>(getOperand(i))->isNullValue()) + return false; + return true; + } virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To); |