diff options
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 11 |
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: |