[clang] [llvm] [RISCV] Update P extension to the 018 version of the spec. (PR #170399)

Sun Dec 7 23:21:06 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `fuchsia-x86_64-linux` running on `fuchsia-debian-64-us-central1-b-1` while building `clang,llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/11/builds/29459

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/fuchsia-linux.py ...' (failure)
...
  Passed           : 47983 (97.32%)
  Expectedly Failed:    24 (0.05%)
[1467/1469] Linking CXX executable unittests/tools/llvm-exegesis/LLVMExegesisTests
[1468/1469] Running the LLVM regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/wasm-ld
-- Testing: 62508 tests, 60 workers --
Testing:  0.. 10.. 20.. 30
FAIL: LLVM :: CodeGen/RISCV/rvp-ext-rv32.ll (20782 of 62508)
******************** TEST 'LLVM :: CodeGen/RISCV/rvp-ext-rv32.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/llc -mtriple=riscv32 -mattr=+experimental-p -enable-p-ext-codegen -verify-machineinstrs < /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll | /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/FileCheck --check-prefixes=CHECK,CHECK-RV32 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/llc -mtriple=riscv32 -mattr=+experimental-p -enable-p-ext-codegen -verify-machineinstrs
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/FileCheck --check-prefixes=CHECK,CHECK-RV32 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll
# .---command stderr------------
# | /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll:719:20: error: CHECK-RV32-NEXT: expected string not found in input
# | ; CHECK-RV32-NEXT: ppack.dh a2, a4, a6
# |                    ^
# | <stdin>:629:16: note: scanning from here
# |  sll a5, a1, a2
# |                ^
# | <stdin>:630:2: note: possible intended match here
# |  ppaire.db a2, a4, a6
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           624:  sll a7, a4, a3 
# |           625:  sll a6, a6, a5 
# |           626:  sll a4, a1, a2 
# |           627:  srli a2, a2, 16 
# |           628:  srli a1, a1, 16 
# |           629:  sll a5, a1, a2 
# | next:719'0                    X error: no match found
# |           630:  ppaire.db a2, a4, a6 
Step 7 (check) failure: check (failure)
...
  Passed           : 47983 (97.32%)
  Expectedly Failed:    24 (0.05%)
[1467/1469] Linking CXX executable unittests/tools/llvm-exegesis/LLVMExegesisTests
[1468/1469] Running the LLVM regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:564: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/wasm-ld
-- Testing: 62508 tests, 60 workers --
Testing:  0.. 10.. 20.. 30
FAIL: LLVM :: CodeGen/RISCV/rvp-ext-rv32.ll (20782 of 62508)
******************** TEST 'LLVM :: CodeGen/RISCV/rvp-ext-rv32.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/llc -mtriple=riscv32 -mattr=+experimental-p -enable-p-ext-codegen -verify-machineinstrs < /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll | /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/FileCheck --check-prefixes=CHECK,CHECK-RV32 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/llc -mtriple=riscv32 -mattr=+experimental-p -enable-p-ext-codegen -verify-machineinstrs
# executed command: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-1qmcih43/bin/FileCheck --check-prefixes=CHECK,CHECK-RV32 /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll
# .---command stderr------------
# | /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll:719:20: error: CHECK-RV32-NEXT: expected string not found in input
# | ; CHECK-RV32-NEXT: ppack.dh a2, a4, a6
# |                    ^
# | <stdin>:629:16: note: scanning from here
# |  sll a5, a1, a2
# |                ^
# | <stdin>:630:2: note: possible intended match here
# |  ppaire.db a2, a4, a6
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/CodeGen/RISCV/rvp-ext-rv32.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           624:  sll a7, a4, a3 
# |           625:  sll a6, a6, a5 
# |           626:  sll a4, a1, a2 
# |           627:  srli a2, a2, 16 
# |           628:  srli a1, a1, 16 
# |           629:  sll a5, a1, a2 
# | next:719'0                    X error: no match found
# |           630:  ppaire.db a2, a4, a6 

```

</details>

https://github.com/llvm/llvm-project/pull/170399