From a5ae71a137b9c6f458cc6c9064be787dbc5f4311 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 6 Mar 2003 21:02:43 +0000 Subject: [PATCH] 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 --- include/llvm/Constants.h | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index ec6345846e3..6c1b8eb1e61 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(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(getOperand(i))->isNullValue()) + return false; + return true; + } virtual void destroyConstant(); virtual void replaceUsesOfWithOnConstant(Value *From, Value *To); -- 2.34.1