[llvm] f3e0431 - LangRef: Update byval/sret description for required types

[Matt Arsenault via llvm-commits]

Author: Matt Arsenault
Date: 2020-12-16T10:25:36-05:00
New Revision: f3e0431b763979c373258f7222668e87bb5d28cb

URL: https://github.com/llvm/llvm-project/commit/f3e0431b763979c373258f7222668e87bb5d28cb
DIFF: https://github.com/llvm/llvm-project/commit/f3e0431b763979c373258f7222668e87bb5d28cb.diff

LOG: LangRef: Update byval/sret description for required types

Added: 
    

Modified: 
    llvm/docs/LangRef.rst

Removed: 
    


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diff  --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
index b29eb589e2d7..cde9ed519626 100644
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -1045,7 +1045,7 @@ Currently, only the following parameter attributes are defined:
     opposed to memory, though some targets use it to distinguish between
     two 
diff erent kinds of registers). Use of this attribute is
     target-specific.
-``byval`` or ``byval(<ty>)``
+``byval(<ty>)``
     This indicates that the pointer parameter should really be passed by
     value to the function. The attribute implies that a hidden copy of
     the pointee is made between the caller and the callee, so the callee
@@ -1057,7 +1057,7 @@ Currently, only the following parameter attributes are defined:
     ``byval`` parameters). This is not a valid attribute for return
     values.
 
-    The byval attribute also supports an optional type argument, which
+    The byval type argument indicates the in-memory value type, and
     must be the same as the pointee type of the argument.
 
     The byval attribute also supports specifying an alignment with the
@@ -1144,7 +1144,7 @@ Currently, only the following parameter attributes are defined:
     See :doc:`InAlloca` for more information on how to use this
     attribute.
 
-``sret`` or ``sret(<ty>)``
+``sret(<ty>)``
     This indicates that the pointer parameter specifies the address of a
     structure that is the return value of the function in the source
     program. This pointer must be guaranteed by the caller to be valid:
@@ -1152,9 +1152,8 @@ Currently, only the following parameter attributes are defined:
     to trap and to be properly aligned. This is not a valid attribute
     for return values.
 
-    The sret attribute also supports an optional type argument, which
-    must be the same as the pointee type of the argument. In the
-    future this will be required.
+    The sret type argument specifies the in memory type, which must be
+    the same as the pointee type of the argument.
 
 .. _attr_align: