INITIALIZE_PASS_END(PeepholeOptimizer, "peephole-opts",
"Peephole Optimizations", false, false)
-/// optimizeExtInstr - If instruction is a copy-like instruction, i.e. it reads
-/// a single register and writes a single register and it does not modify the
-/// source, and if the source value is preserved as a sub-register of the
-/// result, then replace all reachable uses of the source with the subreg of the
-/// result.
+/// If instruction is a copy-like instruction, i.e. it reads a single register
+/// and writes a single register and it does not modify the source, and if the
+/// source value is preserved as a sub-register of the result, then replace all
+/// reachable uses of the source with the subreg of the result.
///
/// Do not generate an EXTRACT that is used only in a debug use, as this changes
/// the code. Since this code does not currently share EXTRACTs, just ignore all
return Changed;
}
-/// optimizeCmpInstr - If the instruction is a compare and the previous
-/// instruction it's comparing against all ready sets (or could be modified to
-/// set) the same flag as the compare, then we can remove the comparison and use
-/// the flag from the previous instruction.
+/// If the instruction is a compare and the previous instruction it's comparing
+/// against already sets (or could be modified to set) the same flag as the
+/// compare, then we can remove the comparison and use the flag from the
+/// previous instruction.
bool PeepholeOptimizer::optimizeCmpInstr(MachineInstr *MI,
MachineBasicBlock *MBB) {
// If this instruction is a comparison against zero and isn't comparing a
return true;
}
-/// isLoadFoldable - Check whether MI is a candidate for folding into a later
-/// instruction. We only fold loads to virtual registers and the virtual
-/// register defined has a single use.
+/// Check whether MI is a candidate for folding into a later instruction.
+/// We only fold loads to virtual registers and the virtual register defined
+/// has a single use.
bool PeepholeOptimizer::isLoadFoldable(
MachineInstr *MI,
SmallSet<unsigned, 16> &FoldAsLoadDefCandidates) {
return false;
}
-/// foldImmediate - Try folding register operands that are defined by move
-/// immediate instructions, i.e. a trivial constant folding optimization, if
+/// Try folding register operands that are defined by move immediate
+/// instructions, i.e. a trivial constant folding optimization, if
/// and only if the def and use are in the same BB.
bool PeepholeOptimizer::foldImmediate(MachineInstr *MI, MachineBasicBlock *MBB,
SmallSet<unsigned, 4> &ImmDefRegs,