Add darwin stub removal to wishlist.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74667 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt
index 688fb30908..1341c66f26 100644
--- a/lib/Target/PowerPC/README.txt
+++ b/lib/Target/PowerPC/README.txt
@@ -180,6 +180,15 @@ void bar() { struct foo R = { 1.0, 2.0 }; xxx(R); }
 
 ===-------------------------------------------------------------------------===
 
+Darwin Stub removal:
+
+We still generate calls to foo$stub, and stubs, on Darwin.  This is not
+necessary on Leopard (10.5) or later, as stubs are generated by ld when
+necessary.  The choice should depend on the value of -mmacosx-version-min.
+x86-32 does this right, see its logic.
+
+===-------------------------------------------------------------------------===
+
 Darwin Stub LICM optimization:
 
 Loops like this:
@@ -196,6 +205,8 @@ which only computes the address of bar once (instead of each time through the
 stub).  This is Darwin specific and would have to be done in the code generator.
 Probably not a win on x86.
 
+Note that removing stubs altogether, as in the previous item, is better yet.
+
 ===-------------------------------------------------------------------------===
 
 Simple IPO for argument passing, change: