[AIX] Disable cfi-version test on AIX

[Jake-Egan]

Summary

.debug_frame is not emitted on AIX, so this patch disables the test.

[shchenz]

I think we are using trace table on AIX instead of .debug_frame/.eh_frame . So marking .debug_frame as not emitted on AIX should be right? @xingxue @hubert.reinterpretcast

[jsji]

In D112593#3089630, @shchenz wrote:

I think we are using trace table on AIX instead of .debug_frame/.eh_frame . So marking .debug_frame as not emitted on AIX should be right? @xingxue @hubert.reinterpretcast

The section name is different, but we do have SSUBTYPE_DWFRAME (.dwframe) in XCOFF.

[shchenz]

In D112593#3090365, @jsji wrote:

In D112593#3089630, @shchenz wrote:

I think we are using trace table on AIX instead of .debug_frame/.eh_frame . So marking .debug_frame as not emitted on AIX should be right? @xingxue @hubert.reinterpretcast

The section name is different, but we do have SSUBTYPE_DWFRAME (.dwframe) in XCOFF.

Yeah, we defined this section, but we will not generate this section now. For the changed test, llc on AIX will not generate .dwframe section for it. And commercial XLC on AIX will also not generate this section.

Do you know will this section be supported in the future? If so, we can just make this case XFAIL.
But if there is no plan to support .dwframe section, we can just mark it as not emit like this patch does?

[jsji]

Do you know will this section be supported in the future? If so, we can just make this case XFAIL.
But if there is no plan to support .dwframe section, we can just mark it as not emit like this patch does?

OK to not emit for now. We can change back once we start to emit it.

[shchenz]

In D112593#3092315, @jsji wrote:

Do you know will this section be supported in the future? If so, we can just make this case XFAIL.
But if there is no plan to support .dwframe section, we can just mark it as not emit like this patch does?

OK to not emit for now. We can change back once we start to emit it.

Thanks.

LGTM too.

llvm/test/MC/ELF/cfi-version.ll

 ; RUN: %llc_dwarf %s -o - -dwarf-version 2 -filetype=obj | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF2
 ; RUN: %llc_dwarf %s -o - -dwarf-version 3 -filetype=obj | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF3
 ; RUN: %llc_dwarf %s -o - -dwarf-version 4 -filetype=obj | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF4
 ; RUN: %llc_dwarf %s -o - -dwarf-version 5 -filetype=obj | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF4
 
 ; PR46647
 ; XFAIL: arm64-apple
 
-; .debug_frame is not emitted for targeting Windows x64 or arm64.
+; .debug_frame is not emitted for targeting Windows x64, arm64, or AIX.
 ; REQUIRES: debug_frame
 ; REQUIRES: default_triple
 
 ; Function Attrs: nounwind
 define i32 @foo() #0 !dbg !4 {
 entry:
   %call = call i32 bitcast (i32 (...)* @bar to i32 ()*)(), !dbg !12
   %add = add nsw i32 %call, 1, !dbg !12

llvm/test/lit.cfg.py

if sysctl_cmd.wait():
         print(
           "Warning: sysctl exists but calling \"{}\" failed, defaulting to no fma3.".format(
           " ".join(cmd)))
     else:
         result = sysctl_cmd.stdout.read().decode('ascii')
         if 'hw.optional.fma: 1' in result:
             config.available_features.add('fma3')
 
-# .debug_frame is not emitted for targeting Windows x64 or arm64.
-if not re.match(r'^(x86_64|arm64).*-(windows-gnu|windows-msvc)', config.target_triple):
+# .debug_frame is not emitted for targeting Windows x64, arm64, or AIX.
+if not re.match(r'^(x86_64|arm64|powerpc|powerpc64).*-(windows-gnu|windows-msvc|aix)', config.target_triple):
     config.available_features.add('debug_frame')
 
 if config.have_libxar:
     config.available_features.add('xar')
 
 if config.enable_threads:
     config.available_features.add('thread_support')
 
 if config.have_libxml2:
     config.available_features.add('libxml2')
 
 if config.have_opt_viewer_modules:
     config.available_features.add('have_opt_viewer_modules')
 
 if config.expensive_checks:
     config.available_features.add('expensive_checks')