diff options
| -rw-r--r-- | llvm/lib/Target/X86/README-SSE.txt | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/README-SSE.txt b/llvm/lib/Target/X86/README-SSE.txt index bbd93bf3ed4..5cccfa8daa4 100644 --- a/llvm/lib/Target/X86/README-SSE.txt +++ b/llvm/lib/Target/X86/README-SSE.txt @@ -472,7 +472,13 @@ _doload64: addl $12, %esp ret -instead of movsd from the stack. +instead of movsd from the stack. This is actually not too bad to implement. The +best way to do this is to implement a dag combine that turns +bitconvert(build_pair(load a, load b)) into one load of the right type. The +only trick to this is writing the predicate that determines that a/b are at the +right offset from each other. For the enterprising hacker, InferAlignment is a +helpful place to start poking if interested. + //===---------------------------------------------------------------------===// |
