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author | Dan Gohman <gohman@apple.com> | 2009-02-22 18:06:32 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2009-02-22 18:06:32 +0000 |
commit | 648c5e9c9928c55a89eb4a71f20cb065686e07ed (patch) | |
tree | 4fb06e91f44b74a9955cf470965afb22f49e33c7 /clang/lib | |
parent | f394e58af589d6c198f4c8eca8f83110d8529b5b (diff) | |
download | bcm5719-llvm-648c5e9c9928c55a89eb4a71f20cb065686e07ed.tar.gz bcm5719-llvm-648c5e9c9928c55a89eb4a71f20cb065686e07ed.zip |
Revert the part of 64623 that attempted to align the source in a
memcpy to match the alignment of the destination. It isn't necessary
for making loads and stores handled like the SSE loadu/storeu
intrinsics, and it was causing a performance regression in
MultiSource/Applications/JM/lencod.
The problem appears to have been a memcpy that copies from some
highly aligned array into an alloca; the alloca was then being
assigned a large alignment, which required codegen to perform
dynamic stack-pointer re-alignment, which forced the enclosing
function to have a frame pointer, which led to increased spilling.
llvm-svn: 65289
Diffstat (limited to 'clang/lib')
0 files changed, 0 insertions, 0 deletions