Integrate llvm-project at c1b5674fbb76

[hanhanW]

• Reset third_party/llvm-project: c1b5674fbb76c4b137a1e856441019605668f1ca (2023-08-28 19:05:55 -0700): [OpenMP] Change OpenMP default version in documentation and help text for -fopenmp-version

Revert commits:

• llvm/llvm-project@dad9de0

[github-actions]

Abbreviated Benchmark Summary

@ commit 6a9b1afa59aa58c4b8d014d1f088310f07b43e37 (vs. base bd79a14909b43b77dfdcb1ab0e2505e9015d2159)

Regressed Latencies 🚩

Benchmark Name	Average Latency (ms)	Median Latency (ms)	Latency Standard Deviation (ms)
PersonDetect\_int8(tflite) [arm-valhall-vulkan\_android31-vulkan\_spirv][experimental-flags,fuse-padding,max-concurrency,repeated-kernel] vulkan(none)[full-inference,experimental-flags] with zeros @ pixel-6-pro[gpu]	1.772 (vs. 1.622, 9.20%↑)	1.753	0.076
MobileNetV1\_fp32(tflite) [x86\_64-cascadelake-linux\_gnu-llvm\_cpu][default-flags] local\_task(embedded\_elf)[1-thread,full-inference,default-flags] with zeros @ c2-standard-16[cpu]	28.822 (vs. 26.913, 7.09%↑)	28.959	0.316

Improved Latencies 🎉

Benchmark Name	Average Latency (ms)	Median Latency (ms)	Latency Standard Deviation (ms)
MobileNetV3Small\_fp32(tflite) [arm-valhall-vulkan\_android31-vulkan\_spirv][default-flags] vulkan(none)[full-inference,default-flags] with zeros @ pixel-6-pro[gpu]	7.726 (vs. 9.226, 16.26%↓)	7.784	0.182
MobileNetV3Small\_fp32(tflite) [arm-valhall-vulkan\_android31-vulkan\_spirv][experimental-flags,fuse-padding,max-concurrency] vulkan(none)[full-inference,default-flags] with zeros @ pixel-6-pro[gpu]	7.718 (vs. 8.591, 10.17%↓)	7.705	0.079
EfficientNet\_int8(tflite) [arm-valhall-vulkan\_android31-vulkan\_spirv][experimental-flags,fuse-padding,max-concurrency] vulkan(none)[full-inference,default-flags] with zeros @ pixel-6-pro[gpu]	7.637 (vs. 8.344, 8.47%↓)	7.634	0.060

[Top 3 out of 13 results showed]

No improved or regressed compilation metrics 🏖️

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[antiagainst]

Wow. A clean integration!!!