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Don't require BUNDLE headers in MachineInstr::getBundleSize().

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It is possible to build MI bundles that don't begin with a BUNDLE
header. Add support for such bundles, counting all instructions inside
the bundle.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171985 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-01-09 18:28:16 +00:00
parent d9cc865787
commit 25377c8c6d
2 changed files with 10 additions and 11 deletions
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6
include/llvm/CodeGen/MachineInstr.h
View File

@ -699,7 +699,11 @@ public:
}
}
/// getBundleSize - Return the number of instructions inside the MI bundle.
/// Return the number of instructions inside the MI bundle, excluding the
/// bundle header.
///
/// This is the number of instructions that MachineBasicBlock::iterator
/// skips, 0 for unbundled instructions.
unsigned getBundleSize() const;
/// readsRegister - Return true if the MachineInstr reads the specified

15
lib/CodeGen/MachineInstr.cpp
View File

@ -982,18 +982,13 @@ MachineInstr::getRegClassConstraint(unsigned OpIdx,
return NULL;
}
/// getBundleSize - Return the number of instructions inside the MI bundle.
/// Return the number of instructions inside the MI bundle, not counting the
/// header instruction.
unsigned MachineInstr::getBundleSize() const {
assert(isBundle() && "Expecting a bundle");
const MachineBasicBlock *MBB = getParent();
MachineBasicBlock::const_instr_iterator I = *this, E = MBB->instr_end();
MachineBasicBlock::const_instr_iterator I = this;
unsigned Size = 0;
while ((++I != E) && I->isInsideBundle()) {
++Size;
}
assert(Size > 1 && "Malformed bundle");
while (I->isBundledWithSucc())
++Size, ++I;
return Size;
}