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diff --git a/docs/StackMaps.rst b/docs/StackMaps.rst
index bd0fb946f9a5..5bb05540dec3 100644
--- a/docs/StackMaps.rst
+++ b/docs/StackMaps.rst
@@ -221,6 +221,12 @@ lowered according to the calling convention specified at the
intrinsic's callsite. Variants of the intrinsic with non-void return
type also return a value according to calling convention.
+On PowerPC, note that the ``<target>`` must be the actual intended target of
+the indirect call, not the function-descriptor address normally used as the
+C/C++ function-pointer representation. As a result, the call target must be
+local because no adjustment or restoration of the TOC pointer (in register r2)
+will be performed.
+
Requesting zero patch point arguments is valid. In this case, all
variable operands are handled just like
``llvm.experimental.stackmap.*``. The difference is that space will