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Refactor rewinding code for finding the first terminator of a basic

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block into MachineBasicBlock::getFirstTerminator().

This also fixes a bug in the implementation of the above in both
RegAllocLocal and InstrSched, where instructions where added after the
terminator if the basic block's only instruction was a terminator (it
shouldn't matter for RegAllocLocal since this case never occurs in
practice).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11748 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2004-02-23 18:14:48 +00:00
parent fbc39d5045
commit 743d0a1f83
6 changed files with 21 additions and 33 deletions
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6
lib/CodeGen/RegAllocLocal.cpp
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@@ -649,11 +649,7 @@ void RA::AllocateBasicBlock(MachineBasicBlock &MBB) {
}
}
// Rewind the iterator to point to the first flow control instruction...
const TargetInstrInfo &TII = TM->getInstrInfo();
MI = MBB.end();
while (MI != MBB.begin() && TII.isTerminatorInstr((--MI)->getOpcode()));
if (MI != MBB.end()) ++MI;
MI = MBB.getFirstTerminator();
// Spill all physical registers holding virtual registers now.
for (unsigned i = 0, e = RegInfo->getNumRegs(); i != e; ++i)