https://bugs.llvm.org/show_bug.cgi?id=37949
Bug ID: 37949
Summary: [X86] library call for rint. GCC: cvtss2si/cvtsd2si
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: roland.sch...@intel.com
CC: llvm-bugs@lists.llvm.org
lrintf/llrint are missed optimization opportunities compared to GCC.
GCC (at least since 4.8) with "-O3 -fno-math-errno" compiles them into
cvtss2si/cvtsd2si and only uses library calls without those flags. Clang always
compiles them into library calls.
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