Andrew Savonichev b451ecd86e [Clang][AArch64] Disable rounding of return values for AArch64 ...

If a return value is explicitly rounded to 64 bits, an additional zext
instruction is emitted, and in some cases it prevents tail call
optimization.

As discussed in D100225, this rounding is not necessary and can be
disabled.

Differential Revision: https://reviews.llvm.org/D100591

2021-05-04 20:29:01 +03:00

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