llvm-project

d508f0cb - [AArch64] Fix FPMR handling when switching streaming mode (#135827)

[AArch64] Fix FPMR handling when switching streaming mode (#135827) According to the [documentation](https://developer.arm.com/documentation/ddi0601/latest/AArch64-Registers/FPMR--Floating-point-Mode-Register), the FPMR register is set to 0 when entering or exiting streaming mode. This patch models that behavior by adding FPMR as an implicit def to the instructions used for entering and exiting streaming mode.