[llvm] [RISCV] Promote fixed-length bf16 arith vector ops with zvfbfmin (PR #112393)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-dev-x86-64` running on `ml-opt-dev-x86-64-b1` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/137/builds/6996

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Analysis/CostModel/RISCV/reduce-fmul.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /b/ml-opt-dev-x86-64-b1/build/bin/opt < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/Analysis/CostModel/RISCV/reduce-fmul.ll -mtriple=riscv64 -mattr=+v,+zfh,+zvfh,+zfbfmin,+zvfbfmin -passes="print<cost-model>" -cost-kind=throughput 2>&1 -disable-output | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/Analysis/CostModel/RISCV/reduce-fmul.ll --check-prefixes=FP-REDUCE,FP-REDUCE-ZVFH
+ /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/Analysis/CostModel/RISCV/reduce-fmul.ll --check-prefixes=FP-REDUCE,FP-REDUCE-ZVFH
+ /b/ml-opt-dev-x86-64-b1/build/bin/opt -mtriple=riscv64 -mattr=+v,+zfh,+zvfh,+zfbfmin,+zvfbfmin '-passes=print<cost-model>' -cost-kind=throughput -disable-output
/b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/Analysis/CostModel/RISCV/reduce-fmul.ll:9:19: error: FP-REDUCE-NEXT: expected string not found in input
; FP-REDUCE-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V2 = call fast bfloat @llvm.vector.reduce.fmul.v2bf16(bfloat 0xR0000, <2 x bfloat> undef)
                  ^
<stdin>:2:149: note: scanning from here
Cost Model: Found an estimated cost of 1 for instruction: %V1 = call fast bfloat @llvm.vector.reduce.fmul.v1bf16(bfloat 0xR0000, <1 x bfloat> undef)
                                                                                                                                                    ^
<stdin>:3:1: note: possible intended match here
Cost Model: Found an estimated cost of 8 for instruction: %V2 = call fast bfloat @llvm.vector.reduce.fmul.v2bf16(bfloat 0xR0000, <2 x bfloat> undef)
^

Input file: <stdin>
Check file: /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/Analysis/CostModel/RISCV/reduce-fmul.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
          1: Printing analysis 'Cost Model Analysis' for function 'reduce_fmul_bfloat': 
          2: Cost Model: Found an estimated cost of 1 for instruction: %V1 = call fast bfloat @llvm.vector.reduce.fmul.v1bf16(bfloat 0xR0000, <1 x bfloat> undef) 
next:9'0                                                                                                                                                         X error: no match found
          3: Cost Model: Found an estimated cost of 8 for instruction: %V2 = call fast bfloat @llvm.vector.reduce.fmul.v2bf16(bfloat 0xR0000, <2 x bfloat> undef) 
next:9'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
next:9'1     ?                                                                                                                                                     possible intended match
          4: Cost Model: Found an estimated cost of 15 for instruction: %V4 = call fast bfloat @llvm.vector.reduce.fmul.v4bf16(bfloat 0xR0000, <4 x bfloat> undef) 
next:9'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          5: Cost Model: Found an estimated cost of 28 for instruction: %V8 = call fast bfloat @llvm.vector.reduce.fmul.v8bf16(bfloat 0xR0000, <8 x bfloat> undef) 
next:9'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          6: Cost Model: Found an estimated cost of 73 for instruction: %V16 = call fast bfloat @llvm.vector.reduce.fmul.v16bf16(bfloat 0xR0000, <16 x bfloat> undef) 
next:9'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          7: Cost Model: Found an estimated cost of 211 for instruction: %v32 = call fast bfloat @llvm.vector.reduce.fmul.v32bf16(bfloat 0xR0000, <32 x bfloat> undef) 
next:9'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          8: Cost Model: Found an estimated cost of 541 for instruction: %V64 = call fast bfloat @llvm.vector.reduce.fmul.v64bf16(bfloat 0xR0000, <64 x bfloat> undef) 
next:9'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          .
          .
          .
>>>>>>

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/112393