[llvm-commits] [llvm] r160968 - in /llvm/trunk: include/llvm/CodeGen/MachineBasicBlock.h lib/CodeGen/MachineBasicBlock.cpp
Jakob Stoklund Olesen
stoklund at 2pi.dk
Mon Jul 30 10:36:47 PDT 2012
Author: stoklund
Date: Mon Jul 30 12:36:47 2012
New Revision: 160968
URL: http://llvm.org/viewvc/llvm-project?rev=160968&view=rev
Log:
Add MachineBasicBlock::isPredecessor().
A->isPredecessor(B) is the same as B->isSuccessor(A), but it can
tolerate a B that is null or dangling. This shouldn't happen normally,
but it it useful for verification code.
Modified:
llvm/trunk/include/llvm/CodeGen/MachineBasicBlock.h
llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp
Modified: llvm/trunk/include/llvm/CodeGen/MachineBasicBlock.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/MachineBasicBlock.h?rev=160968&r1=160967&r2=160968&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/MachineBasicBlock.h (original)
+++ llvm/trunk/include/llvm/CodeGen/MachineBasicBlock.h Mon Jul 30 12:36:47 2012
@@ -379,6 +379,10 @@
/// which refer to fromMBB to refer to this.
void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB);
+ /// isPredecessor - Return true if the specified MBB is a predecessor of this
+ /// block.
+ bool isPredecessor(const MachineBasicBlock *MBB) const;
+
/// isSuccessor - Return true if the specified MBB is a successor of this
/// block.
bool isSuccessor(const MachineBasicBlock *MBB) const;
Modified: llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp?rev=160968&r1=160967&r2=160968&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineBasicBlock.cpp Mon Jul 30 12:36:47 2012
@@ -540,9 +540,12 @@
}
}
+bool MachineBasicBlock::isPredecessor(const MachineBasicBlock *MBB) const {
+ return std::find(pred_begin(), pred_end(), MBB) != pred_end();
+}
+
bool MachineBasicBlock::isSuccessor(const MachineBasicBlock *MBB) const {
- const_succ_iterator I = std::find(Successors.begin(), Successors.end(), MBB);
- return I != Successors.end();
+ return std::find(succ_begin(), succ_end(), MBB) != succ_end();
}
bool MachineBasicBlock::isLayoutSuccessor(const MachineBasicBlock *MBB) const {
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