llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-15 07:34:33 +00:00

History

Tim Northover fef8e383eb ARM64: use 32-bit moves for constants where possible.

If we know that a particular 64-bit constant has all high bits zero, then we
can rely on the fact that 32-bit ARM64 instructions automatically zero out the
high bits of an x-register. This gives the expansion logic less constraints to
satisfy and so sometimes allows it to pick better sequences.

Came up while porting test/CodeGen/AArch64/movw-consts.ll: this will allow a
32-bit MOVN to be used in @test8 soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206379 91177308-0d34-0410-b5e6-96231b3b80d8

2014-04-16 11:52:51 +00:00

AArch64

ARM64: use 32-bit moves for constants where possible.

2014-04-16 11:52:51 +00:00

ARM

Make FastISel::SelectInstruction return before target specific fast-isel code

2014-04-15 21:30:06 +00:00

ARM64

ARM64: use 32-bit moves for constants where possible.

2014-04-16 11:52:51 +00:00

CPP

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