[llvm] [AArch64] Optimize vector slide shuffles with zeros to use shift instructions (PR #185170)
via llvm-commits
llvm-commits at lists.llvm.org
Sun Mar 8 00:30:56 PST 2026
github-actions[bot] wrote:
<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results
* 170851 tests passed
* 3016 tests skipped
* 1 test failed
## Failed Tests
(click on a test name to see its output)
### LLVM
<details>
<summary>LLVM.CodeGen/AArch64/ext-narrow-index.ll</summary>
```
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll -mtriple=aarch64 | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll --check-prefixes=CHECK,CHECK-SD
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -mtriple=aarch64
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll --check-prefixes=CHECK,CHECK-SD
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll:241:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: movi v1.2d, #0000000000000000
# | ^
# | <stdin>:250:20: note: scanning from here
# | // %bb.0: // %entry
# | ^
# | <stdin>:251:2: note: possible intended match here
# | ext v0.16b, v0.16b, v0.16b, #8
# | ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll:292:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: movi v1.2d, #0000000000000000
# | ^
# | <stdin>:300:20: note: scanning from here
# | // %bb.0: // %entry
# | ^
# | <stdin>:301:2: note: possible intended match here
# | ext v0.16b, v0.16b, v0.16b, #8
# | ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll:336:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: movi v1.2d, #0000000000000000
# | ^
# | <stdin>:350:20: note: scanning from here
# | // %bb.0: // %entry
# | ^
# | <stdin>:351:2: note: possible intended match here
# | ext v0.16b, v0.16b, v0.16b, #8
# | ^
# |
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/ext-narrow-index.ll
# |
# | -dump-input=help explains the following input dump.
# |
# | Input was:
# | <<<<<<
# | .
# | .
# | .
# | 245: .globl i8_zero_off15 // -- Begin function i8_zero_off15
# | 246: .p2align 2
# | 247: .type i8_zero_off15, at function
# | 248: i8_zero_off15: // @i8_zero_off15
# | 249: .cfi_startproc
# | 250: // %bb.0: // %entry
# | next:241'0 X error: no match found
# | 251: ext v0.16b, v0.16b, v0.16b, #8
# | next:241'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:241'1 ? possible intended match
# | 252: ushr d0, d0, #56
# | next:241'0 ~~~~~~~~~~~~~~~~~~
# | 253: ret
# | next:241'0 ~~~~~
# | 254: .Lfunc_end19:
# | next:241'0 ~~~~~~~~~~~~~~
# | 255: .size i8_zero_off15, .Lfunc_end19-i8_zero_off15
# | next:241'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 256: .cfi_endproc
# | next:241'0 ~~~~~~~~~~~~~~
# | .
# | .
# | .
# | 295: .globl i16_zero_off7 // -- Begin function i16_zero_off7
# | 296: .p2align 2
# | 297: .type i16_zero_off7, at function
# | 298: i16_zero_off7: // @i16_zero_off7
# | 299: .cfi_startproc
# | 300: // %bb.0: // %entry
# | next:292'0 X error: no match found
# | 301: ext v0.16b, v0.16b, v0.16b, #8
# | next:292'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:292'1 ? possible intended match
# | 302: ushr d0, d0, #48
# | next:292'0 ~~~~~~~~~~~~~~~~~~
# | 303: ret
# | next:292'0 ~~~~~
# | 304: .Lfunc_end23:
# | next:292'0 ~~~~~~~~~~~~~~
# | 305: .size i16_zero_off7, .Lfunc_end23-i16_zero_off7
# | next:292'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 306: .cfi_endproc
# | next:292'0 ~~~~~~~~~~~~~~
# | .
# | .
# | .
# | 345: .globl i32_zero_off3 // -- Begin function i32_zero_off3
# | 346: .p2align 2
# | 347: .type i32_zero_off3, at function
# | 348: i32_zero_off3: // @i32_zero_off3
# | 349: .cfi_startproc
# | 350: // %bb.0: // %entry
# | next:336'0 X error: no match found
# | 351: ext v0.16b, v0.16b, v0.16b, #8
# | next:336'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:336'1 ? possible intended match
# | 352: ushr d0, d0, #32
# | next:336'0 ~~~~~~~~~~~~~~~~~~
# | 353: ret
# | next:336'0 ~~~~~
# | 354: .Lfunc_end27:
# | next:336'0 ~~~~~~~~~~~~~~
# | 355: .size i32_zero_off3, .Lfunc_end27-i32_zero_off3
# | next:336'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 356: .cfi_endproc
# | next:336'0 ~~~~~~~~~~~~~~
# | .
# | .
# | .
# | >>>>>>
# `-----------------------------
# 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/185170
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