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26047ead4b
We don't do a great job with >= 0 comparisons against zero when the
result is used as an i8.
Given something like:
void f(long long LL, bool *B) {
*B = LL >= 0;
}
We used to generate:
shrq $63, %rdi
xorb $1, %dil
movb %dil, (%rsi)
Now we generate:
testq %rdi, %rdi
setns (%rsi)
Differential Revision: http://reviews.llvm.org/D12136
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245498 91177308-0d34-0410-b5e6-96231b3b80d8
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