Go patch committed: Implement go:noinline and go:nosplit directives
Ian Lance Taylor
iant@golang.org
Wed Aug 10 00:46:00 GMT 2016
This patch to the Go frontend implements the go:noinline and
go:nosplit compiler directives. Bootstrapped and ran Go testsuite on
x86_64-pc-linux-gnu. Committed to mainline.
Ian
-------------- next part --------------
Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE (revision 239311)
+++ gcc/go/gofrontend/MERGE (working copy)
@@ -1,4 +1,4 @@
-85a9c6992d9660e36972c279a5252fd9591bb765
+8da2129a005cc1f44d4d993b0b7312b64c0d68a4
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.
Index: gcc/go/gofrontend/gogo.cc
===================================================================
--- gcc/go/gofrontend/gogo.cc (revision 239311)
+++ gcc/go/gofrontend/gogo.cc (working copy)
@@ -5083,11 +5083,19 @@ Function::get_or_make_decl(Gogo* gogo, N
if (this->calls_defer_retaddr_)
is_inlinable = false;
+ // Check the //go:noinline compiler directive.
+ if ((this->pragmas_ & GOPRAGMA_NOINLINE) != 0)
+ is_inlinable = false;
+
// If this is a thunk created to call a function which calls
// the predeclared recover function, we need to disable
// stack splitting for the thunk.
bool disable_split_stack = this->is_recover_thunk_;
+ // Check the //go:nosplit compiler directive.
+ if ((this->pragmas_ & GOPRAGMA_NOSPLIT) != 0)
+ disable_split_stack = true;
+
// This should go into a unique section if that has been
// requested elsewhere, or if this is a nointerface function.
// We want to put a nointerface function into a unique section
Index: gcc/go/gofrontend/lex.cc
===================================================================
--- gcc/go/gofrontend/lex.cc (revision 239311)
+++ gcc/go/gofrontend/lex.cc (working copy)
@@ -1842,13 +1842,11 @@ Lex::skip_cpp_comment()
{
// Applies to the next function. Do not split the stack when
// entering the function.
- // FIXME: Not implemented.
this->pragmas_ |= GOPRAGMA_NOSPLIT;
}
else if (verb == "go:noinline")
{
// Applies to the next function. Do not inline the function.
- // FIXME: Not implemented.
this->pragmas_ |= GOPRAGMA_NOINLINE;
}
else if (verb == "go:systemstack")
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