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3202aa7800
This CL introduces some minor changes to match rules more closely to the instructions they are targeting. s390x logical operation with immediate instructions typically leave some bits in the target register unchanged. This means for example that an XOR with -1 requires 2 instructions. It is better in cases such as this to create a constant and leave it visible to the compiler so that it can be reused rather than hiding it in the assembler. This CL also tweaks the rules a bit to ensure that constants are folded when possible. Change-Id: I1c6dee31ece00fc3c5fdf6a24f1abbc91dd2db2a Reviewed-on: https://go-review.googlesource.com/31754 Reviewed-by: Keith Randall <khr@golang.org> |
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