[clang] [llvm] [Clang][InstCombine] Recognise div/ldiv/lldiv libcalls (PR #215868)

[via cfe-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 180415 tests passed
* 3665 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.tools/llvm-tli-checker/ps4-tli-check.yaml</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 4
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/yaml2obj /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/tools/llvm-tli-checker/ps4-tli-check.yaml -DTYPE=ET_REL -DLABEL=Symbols -DZDAPV=_ZdaPv -o=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/tools/llvm-tli-checker/Output/ps4-tli-check.yaml.tmp1
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/yaml2obj /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/tools/llvm-tli-checker/ps4-tli-check.yaml -DTYPE=ET_REL -DLABEL=Symbols -DZDAPV=_ZdaPv -o=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/tools/llvm-tli-checker/Output/ps4-tli-check.yaml.tmp1
# note: command had no output on stdout or stderr
# RUN: at line 5
llvm-tli-checker --triple=x86_64-scei-ps4 /home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/tools/llvm-tli-checker/Output/ps4-tli-check.yaml.tmp1 | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/tools/llvm-tli-checker/ps4-tli-check.yaml
# executed command: llvm-tli-checker --triple=x86_64-scei-ps4 /home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/tools/llvm-tli-checker/Output/ps4-tli-check.yaml.tmp1
# 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/tools/llvm-tli-checker/ps4-tli-check.yaml
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/tools/llvm-tli-checker/ps4-tli-check.yaml:35:10: error: CHECK: expected string not found in input
# | # CHECK: << Total TLI yes SDK no: 18
# |          ^
# | <stdin>:1:1: note: scanning from here
# | TLI knows 531 symbols, 298 available for 'x86_64-scei-ps4'
# | ^
# | <stdin>:27:1: note: possible intended match here
# | << Total TLI yes SDK no: 21
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/tools/llvm-tli-checker/ps4-tli-check.yaml
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: TLI knows 531 symbols, 298 available for 'x86_64-scei-ps4' 
# | check:35'0    {                                                             search range start (exclusive)
# | check:35'1                                                                  error: no match found in search range
# |             2:  
# |             3: Looking for symbols in '/home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/tools/llvm-tli-checker/Output/ps4-tli-check.yaml.tmp1' 
# |             4: Found 277 global function symbols in '/home/gha/actions-runner/_work/llvm-project/llvm-project/build/test/tools/llvm-tli-checker/Output/ps4-tli-check.yaml.tmp1' 
# |             5: Found a grand total of 277 library symbols 
# |             6: << TLI yes SDK no : '_Znam12__hot_cold_t' aka operator new[](unsigned long, __hot_cold_t) 
# |             .
# |             .
# |             .
# |            22: << TLI yes SDK no : 'fminimum_num' 
# |            23: << TLI yes SDK no : 'fminimum_numf' 
# |            24: << TLI yes SDK no : 'fminimum_numl' 
# |            25: << TLI yes SDK no : 'ldiv' 
# |            26: << TLI yes SDK no : 'lldiv' 
# |            27: << Total TLI yes SDK no: 21 
# | check:35'2     ?                             possible intended match
# |            28: >> Total TLI no SDK yes: 0 
# |            29: == Total TLI yes SDK yes: 277 
# |            30: FAIL: LLVM TLI doesn't match SDK libraries. 
# | check:35'3                                                 } search range end (exclusive)
# | >>>>>>
# `-----------------------------
# 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/215868