rustc_target: Sync with stdarch (important parts) #138820
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Hmm, considering the minimum LLVM version, I have to remove |
Of RISC-V features defined in stdarch, this commit adds extensions
satisfying following criteria:
* Formerly a part of the "I" extension and splitted thereafter
(now ratified as "I" + "Zifencei" + "Zicsr" + "Zicntr" + "Zihpm") or
* Dicoverable from newer versions of the Linux kernel ("Zihintpause").
This is based on the latest ratified ISA Manuals (version 20240411).
One of those, "Zicsr", is a dependency of many other ISA extensions and
this commit adds correct dependencies to "Zicsr" except "V"
(due to an ongoing PR).
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Of RISC-V features defined in stdarch, this commit adds ratified extensions satisfying following criteria:
Iextension and splitted thereafter (now ratified asI+Zifencei+Zicsr+Zicntr+Zihpm) orZtsoandZihintpause).This is based on the latest ratified ISA Manuals (version 20240411).
LLVM Definitions:
ZifenceiZicsrZicntrZihpmZtsoZihintpauseOne of those,
Zicsr, is a dependency of many other ISA extensions and this commit adds correct dependencies toZicsrexceptV(due to ongoing PR #138742).Related:
#[target_feature]#44839(
riscv_target_feature)(This PR can be a prerequisite of resolving a part of that tracking issue)
(Touches the same place and vector extensions depend on
Zicsr)NOT Related but linked:
-Ctarget-features must be restrained on RISCV #132618(This PR won't be blocked by this issue since none of those extensions do not change the ABI)
@rustbot label +T-compiler +O-riscv +A-target-feature