Remove an incorrect overaggressive optimization

[oota-llvm.git] / lib / Target / PowerPC / README.txt

diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt
index 688fb3090803530ba9ac8d1d16ba8bc08736a37a..f5e50fc808a8d87ebe3547e0c5d3eaa2a5c20df6 100644 (file)
--- a/lib/Target/PowerPC/README.txt
+++ b/lib/Target/PowerPC/README.txt
@@ -149,7 +149,7 @@ http://gcc.gnu.org/ml/gcc-patches/2006-02/msg00133.html
 
 Implement Newton-Rhapson method for improving estimate instructions to the
 correct accuracy, and implementing divide as multiply by reciprocal when it has
-more than one use.  Itanium will want this too.
+more than one use.  Itanium would want this too.
 
 ===-------------------------------------------------------------------------===
 
@@ -180,6 +180,16 @@ 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 when building with the Leopard (10.5) or later linker, as stubs are
+generated by ld when necessary.  Parameterizing this based on the deployment
+target (-mmacosx-version-min) is probably enough.  x86-32 does this right, see
+its logic.
+
+===-------------------------------------------------------------------------===
+
 Darwin Stub LICM optimization:
 
 Loops like this: