[llvm] [RISCV] Add cost for @llvm.vector.splice.{left, right} (PR #179219)

via llvm-commits llvm-commits at lists.llvm.org
Mon Feb 2 04:57:52 PST 2026 

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 130373 tests passed
* 2897 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### LLVM
<details>
<summary>LLVM.Analysis/CostModel/RISCV/rvv-shuffle.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 4
c:\_work\llvm-project\llvm-project\build\bin\opt.exe -passes="print<cost-model>" 2>&1 -disable-output -mtriple=riscv64 -mattr=+m,+v < C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll --check-prefixes=CHECK,ARGBASED
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\opt.exe' '-passes=print<cost-model>' -disable-output -mtriple=riscv64 -mattr=+m,+v
# note: command had no output on stdout or stderr
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll' --check-prefixes=CHECK,ARGBASED
# note: command had no output on stdout or stderr
# RUN: at line 5
c:\_work\llvm-project\llvm-project\build\bin\opt.exe -passes="print<cost-model>" 2>&1 -disable-output -mtriple=riscv64 -mattr=+v,+v -intrinsic-cost-strategy=type-based-intrinsic-cost < C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll --check-prefixes=CHECK,TYPEBASED
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\opt.exe' '-passes=print<cost-model>' -disable-output -mtriple=riscv64 -mattr=+v,+v -intrinsic-cost-strategy=type-based-intrinsic-cost
# note: command had no output on stdout or stderr
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll' --check-prefixes=CHECK,TYPEBASED
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll:169:19: error: TYPEBASED-NEXT: expected string not found in input
# | ; TYPEBASED-NEXT: Cost Model: Invalid cost for instruction: %1 = call <vscale x 16 x i8> @llvm.vector.splice.left.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1)
# |                   ^
# | <stdin>:42:69: note: scanning from here
# | Printing analysis 'Cost Model Analysis' for function 'vector_splice':
# |                                                                     ^
# | <stdin>:43:32: note: possible intended match here
# | Cost Model: Found an estimated cost of 4 for instruction: %1 = call <vscale x 16 x i8> @llvm.vector.splice.left.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1)
# |                                ^
# | 
# | Input file: <stdin>
# | Check file: C:\_work\llvm-project\llvm-project\llvm\test\Analysis\CostModel\RISCV\rvv-shuffle.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |            37: Cost Model: Found an estimated cost of 15 for instruction: %reverse_nxv16i1 = call <vscale x 16 x i1> @llvm.vector.reverse.nxv16i1(<vscale x 16 x i1> undef) 
# |            38: Cost Model: Found an estimated cost of 10 for instruction: %reverse_nxv8i1 = call <vscale x 8 x i1> @llvm.vector.reverse.nxv8i1(<vscale x 8 x i1> undef) 
# |            39: Cost Model: Found an estimated cost of 10 for instruction: %reverse_nxv4i1 = call <vscale x 4 x i1> @llvm.vector.reverse.nxv4i1(<vscale x 4 x i1> undef) 
# |            40: Cost Model: Found an estimated cost of 10 for instruction: %reverse_nxv2i1 = call <vscale x 2 x i1> @llvm.vector.reverse.nxv2i1(<vscale x 2 x i1> undef) 
# |            41: Cost Model: Found an estimated cost of 0 for instruction: ret void 
# |            42: Printing analysis 'Cost Model Analysis' for function 'vector_splice': 
# | next:169'0                                                                         X~ error: no match found
# |            43: Cost Model: Found an estimated cost of 4 for instruction: %1 = call <vscale x 16 x i8> @llvm.vector.splice.left.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1) 
# | next:169'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:169'1                                    ?                                                                                                                                                                        possible intended match
# |            44: Cost Model: Found an estimated cost of 8 for instruction: %2 = call <vscale x 32 x i8> @llvm.vector.splice.left.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 1) 
# | next:169'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            45: Cost Model: Found an estimated cost of 2 for instruction: %3 = call <vscale x 2 x i16> @llvm.vector.splice.left.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 1) 
# | next:169'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            46: Cost Model: Found an estimated cost of 2 for instruction: %4 = call <vscale x 4 x i16> @llvm.vector.splice.left.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 1) 
# | next:169'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            47: Cost Model: Found an estimated cost of 4 for instruction: %5 = call <vscale x 8 x i16> @llvm.vector.splice.left.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 1) 
# | next:169'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            48: Cost Model: Found an estimated cost of 8 for instruction: %6 = call <vscale x 16 x i16> @llvm.vector.splice.left.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 1) 
# | next:169'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/179219

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