[llvm] [RISCV] Make All VType Parts Optional (PR #144971)

[Craig Topper via llvm-commits]

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@@ -1,12 +1,6 @@
 # RUN: not llvm-mc -triple=riscv64 --mattr=+v --mattr=+f %s 2>&1 \
 # RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 
-vsetivli a2, 32, e8,m1
-# CHECK-ERROR: operand must be e[8|16|32|64],m[1|2|4|8|f2|f4|f8],[ta|tu],[ma|mu]
-
-vsetivli a2, zero, e8,m1
-# CHECK-ERROR: operand must be e[8|16|32|64],m[1|2|4|8|f2|f4|f8],[ta|tu],[ma|mu]
-
 vsetivli a2, 5, (1 << 10)
 # CHECK-ERROR: operand must be e[8|16|32|64],m[1|2|4|8|f2|f4|f8],[ta|tu],[ma|mu]
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topperc wrote:

> That way it works correctly, but we also get to tell users we don't want to support the optional syntax indefinitely (presumably when another version of the spec is officially released/ratified, the fields will no longer be optional)

What would be considered an official release? It's not listed as optional in the ISA manual from May 2025 here https://lf-riscv.atlassian.net/wiki/spaces/HOME/pages/16154769/RISC-V+Technical+Specifications#ISA-Specifications

https://github.com/llvm/llvm-project/pull/144971