https://bugs.llvm.org/show_bug.cgi?id=37554
Bug ID: 37554
Summary: [X86][F16C] Replace __builtin_ia32_vcvtph2ps* with
generic code
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Inspired by https://reviews.llvm.org/D47174, it should be possible to replace
the __builtin_ia32_vcvtph2ps* intrinsics with generic half2float conversions.
This would require a little work in the backend and legalizers as we currently
don't do a good job of lowering such code (see
llvm\test\CodeGen\X86\vector-half-conversions.ll)
InstCombiner::visitCallInst already has some basic constant folding and
demanded elts support.
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