[Hexagon] Use constant extenders to fix up hardware loops
Use a loop instruction with a constant extender for a hardware
loop instruction that is too far away from the start of the loop.
This is cheaper than changing the SA register value.
Differential Revision: http://reviews.llvm.org/D9262
llvm-svn: 235882
diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp
index e19910e..15cda71 100644
--- a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonInstPrinter.cpp
@@ -249,3 +249,17 @@
printOperand(MI, OpNo, O);
O << ')';
}
+
+void HexagonInstPrinter::printExtBrtarget(const MCInst *MI, unsigned OpNo,
+ raw_ostream &O) const {
+ const MCOperand &MO = MI->getOperand(OpNo);
+ const MCInstrDesc &MII = getMII().get(MI->getOpcode());
+
+ assert((isExtendable(MII.TSFlags) || isExtended(MII.TSFlags)) &&
+ "Expecting an extendable operand");
+
+ if (MO.isExpr() || isExtended(MII.TSFlags)) {
+ O << "##";
+ }
+ printOperand(MI, OpNo, O);
+}