[ClangImporter] Fix Build Break Due to clang API changes

[qiongsiwu]

swiftlang/llvm-project#11631 is cherry-picking clang commits that change CompilerInstance's APIs. The API changes are causing Swift build breaks. This PR fixes the API breaks.

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please smoke test.

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please test Windows

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please smoke test.

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please test Windows

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please smoke test.

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please test Windows

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please smoke test.

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please smoke test.

[qiongsiwu]

swiftlang/llvm-project#11631

@swift-ci please smoke test.

[qiongsiwu]

The macOS failure could be dependency scanning related (https://ci.swift.org/job/swift-PR-macos-smoke-test/23721/consoleFull). Specifically, the error is _Builtin_stdint-AQKSPIMLZOESNDH73ZPMF2AZI.pcm' is out of date and needs to be rebuilt: module file has a different size than expected when we build LocalTestingDistributedActorSystem.swift. I cannot reproduce this failure on desk so far.

[nkcsgexi]

Probably similar to #84995?

[artemcm]

@swift-ci Please clean smoke test macOS platform

[artemcm]

swiftlang/llvm-project#11631
@swift-ci Please clean smoke test macOS platform

[vanvoorden]

https://ci.swift.org/job/swift-PR-macos-smoke-test/23793/

[2025-10-21T19:11:28.306Z] error: generate-pcm command failed with exit code 1 (use -v to see invocation)
[2025-10-21T19:11:28.306Z] <module-includes>:1:9: note: in file included from <module-includes>:1:
[2025-10-21T19:11:28.306Z] 1 | #import "tgmath.h"
[2025-10-21T19:11:28.306Z]   |         `- note: in file included from <module-includes>:1:
[2025-10-21T19:11:28.306Z] 2 | 
[2025-10-21T19:11:28.306Z] 
[2025-10-21T19:11:28.306Z] 1 error generated.
[2025-10-21T19:11:28.306Z] /Users/ec2-user/jenkins/workspace/swift-PR-macos-smoke-test/branch-main/build/buildbot_incremental/llvm-macosx-x86_64/lib/clang/21/include/tgmath.h:21:4: error: module file '/var/folders/bb/hcrjxg1s0b96pfst0ymhmp240000gn/C/clang/ModuleCache/_math-6X1XIJLGY09OU392JSQVQDTP4.pcm' is out of date and needs to be rebuilt: module file has a different size than expected
[2025-10-21T19:11:28.306Z]   19 |  */
[2025-10-21T19:11:28.306Z]   20 | #if defined(__APPLE__) && __STDC_HOSTED__ && __has_include_next(<tgmath.h>)
[2025-10-21T19:11:28.306Z]   21 | #  include_next <tgmath.h>
[2025-10-21T19:11:28.306Z]      |    |- error: module file '/var/folders/bb/hcrjxg1s0b96pfst0ymhmp240000gn/C/clang/ModuleCache/_math-6X1XIJLGY09OU392JSQVQDTP4.pcm' is out of date and needs to be rebuilt: module file has a different size than expected
[2025-10-21T19:11:28.306Z]      |    `- note: imported by module '_tgmath' in '/var/folders/bb/hcrjxg1s0b96pfst0ymhmp240000gn/C/clang/ModuleCache/_tgmath-2GYTFMG43DA744YYSLNZJ1P27.pcm'
[2025-10-21T19:11:28.306Z]   22 | #else

@jansvoboda11 I think I saw this similar error when trying to run smoke tests. Do I need to rebase my branch diff on the new main commit after this diff lands?

[jansvoboda11]

@vanvoorden I think one of my PRs introduced a bug. I have reverts here: swiftlang/llvm-project#11670 #85051

[vanvoorden]

@jansvoboda11 I rebased my diff yesterday in the morning on main but I still saw smoke test failures… were there any new diffs that landed that might help?

[jansvoboda11]

Does your branch contain the reverts mentioned above? I'm not aware of other commits you'd need to fix the issue.

[vanvoorden]

@jansvoboda11 Yes I rebased from yesterday which should have included the reverts. Hmm… are these smoke test jobs generally just flaky to begin with?