[PATCH] D23986: [XRay] Detect and emit sleds for sibling/tail calls

[Serge Rogatch via llvm-commits]

rSerge added inline comments.

================
Comment at: llvm/trunk/lib/Target/X86/X86MCInstLower.cpp:1126
@@ +1125,3 @@
+      TC.addOperand(MaybeOperand.getValue());
+  OutStreamer->EmitInstruction(TC, getSubtargetInfo());
+}
----------------
Why all the hassle with passing the original tail call instruction and its operands in the arguments of the patchable tail call instruction, instead of just prepending the original tail call instruction with the sled code?


Repository:
  rL LLVM

https://reviews.llvm.org/D23986