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| author | dim <dim@FreeBSD.org> | 2015-09-24 21:20:00 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2015-09-24 21:20:00 +0000 |
| commit | a16871dddc15a603633dacce3ae4cd7c3e991ab7 (patch) | |
| tree | 0b56946b96fb6ba855a8350aaee61432ba7e1b95 /lib/libc/stdio/stdio.c | |
| parent | eebb6d6061c2c96b15494293aad17222343f343b (diff) | |
| download | FreeBSD-src-a16871dddc15a603633dacce3ae4cd7c3e991ab7.zip FreeBSD-src-a16871dddc15a603633dacce3ae4cd7c3e991ab7.tar.gz | |
Pull in r248439 from upstream llvm trunk (by Sanjay Patel):
set div/rem default values to 'expensive' in TargetTransformInfo's
cost model
...because that's what the cost model was intended to do.
As discussed in D12882, this fix has a temporary unintended
consequence for SimplifyCFG: it causes us to not speculate an fdiv.
However, two wrongs make PR24818 right, and two wrongs make PR24343
act right even though it's really still wrong.
I intend to correct SimplifyCFG and add to CodeGenPrepare to account
for this cost model change and preserve the righteousness for the bug
report cases.
https://llvm.org/bugs/show_bug.cgi?id=24818
https://llvm.org/bugs/show_bug.cgi?id=24343
Differential Revision: http://reviews.llvm.org/D12882
This fixes the too-eager fdiv hoisting in pow(), which could lead to
unexpected floating point exceptions.
Diffstat (limited to 'lib/libc/stdio/stdio.c')
0 files changed, 0 insertions, 0 deletions
