[llvm] [RISCV] Generate landing pad based on cf-protection-branch flag only (PR #179960)

[via llvm-commits]

github-actions[bot] wrote:

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

* 133612 tests passed
* 3100 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.CodeGen/RISCV/tail-calls.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
c:\_work\llvm-project\llvm-project\build\bin\llc.exe -mtriple riscv32-unknown-linux-gnu -o - C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\tail-calls.ll | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\tail-calls.ll
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\llc.exe' -mtriple riscv32-unknown-linux-gnu -o - 'C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\tail-calls.ll'
# 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\CodeGen\RISCV\tail-calls.ll'
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\tail-calls.ll:444:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: lw t0, 20(sp)
# |               ^
# | <stdin>:111:18: note: scanning from here
# | # %bb.0: # %entry
# |                  ^
# | <stdin>:114:2: note: possible intended match here
# |  lw t0, 32(sp)
# |  ^
# | C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\tail-calls.ll:541:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: addi sp, sp, -16
# |               ^
# | <stdin>:137:18: note: scanning from here
# | # %bb.0: # %entry
# |                  ^
# | <stdin>:138:2: note: possible intended match here
# |  addi sp, sp, -32
# |  ^
# | 
# | Input file: <stdin>
# | Check file: C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\RISCV\tail-calls.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           106:  # -- End function 
# |           107:  .globl caller_args # -- Begin function caller_args 
# |           108:  .p2align 2 
# |           109:  .type caller_args, at function 
# |           110: caller_args: # @caller_args 
# |           111: # %bb.0: # %entry 
# | next:444'0                      X error: no match found
# |           112:  addi sp, sp, -32 
# | next:444'0     ~~~~~~~~~~~~~~~~~~
# |           113:  sw ra, 28(sp) # 4-byte Folded Spill 
# | next:444'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           114:  lw t0, 32(sp) 
# | next:444'0     ~~~~~~~~~~~~~~~
# | next:444'1      ?              possible intended match
# |           115:  lw t1, 36(sp) 
# | next:444'0     ~~~~~~~~~~~~~~~
# |           116:  lw t2, 40(sp) 
# | next:444'0     ~~~~~~~~~~~~~~~
# |           117:  lw t3, 44(sp) 
# | next:444'0     ~~~~~~~~~~~~~~~
# |           118:  lw t4, 48(sp) 
# | next:444'0     ~~~~~~~~~~~~~~~
# |           119:  lw t5, 52(sp) 
# | next:444'0     ~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# |           132:  # -- End function 
# | next:444'0     ~~~~~~~~~~~~~~~~~~~
# |           133:  .globl caller_indirect_args # -- Begin function caller_indirect_args 
# | next:444'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           134:  .p2align 2 
# | next:444'0     ~~~~~~~~~~~~
# |           135:  .type caller_indirect_args, at function 
# | next:444'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           136: caller_indirect_args: # @caller_indirect_args 
# | next:444'0     ~~~~~~~~~~~~~~~~~~~~~
# |           137: # %bb.0: # %entry 
# | next:541'0                      X error: no match found
# |           138:  addi sp, sp, -32 
# | next:541'0     ~~~~~~~~~~~~~~~~~~
# | next:541'1      ?                 possible intended match
# |           139:  sw ra, 28(sp) # 4-byte Folded Spill 
# | next:541'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           140:  lui a1, 262128 
# | next:541'0     ~~~~~~~~~~~~~~~~
# |           141:  mv a0, sp 
# | next:541'0     ~~~~~~~~~~~
# |           142:  sw zero, 0(sp) 
# | next:541'0     ~~~~~~~~~~~~~~~~
# |           143:  sw zero, 4(sp) 
# | next:541'0     ~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# 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/179960