Reapply: [MC/DC][Coverage] Loosen the limit of NumConds from 6 (#82448)

By storing possible test vectors instead of combinations of conditions,
the restriction is dramatically relaxed.

This introduces two options to `cc1`:

* `-fmcdc-max-conditions=32767`
* `-fmcdc-max-test-vectors=2147483646`

This change makes coverage mapping, profraw, and profdata incompatible
with Clang-18.

- Bitmap semantics changed. It is incompatible with previous format.
- `BitmapIdx` in `Decision` points to the end of the bitmap.
- Bitmap is packed per function.
- `llvm-cov` can understand `profdata` generated by `llvm-profdata-18`.

RFC:
https://discourse.llvm.org/t/rfc-coverage-new-algorithm-and-file-format-for-mc-dc/76798

--
Change(s) since llvmorg-19-init-14288-g7ead2d8c7e91

- Update compiler-rt/test/profile/ContinuousSyncMode/image-with-mcdc.c

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler-rt/test/profile/ContinuousSyncMode/image-with-mcdc.c b/compiler-rt/test/profile/ContinuousSyncMode/image-with-mcdc.c
index 748af46..d2afe70 100644
--- a/compiler-rt/test/profile/ContinuousSyncMode/image-with-mcdc.c
+++ b/compiler-rt/test/profile/ContinuousSyncMode/image-with-mcdc.c
@@ -7,7 +7,7 @@
 // CHECK: Num Bitmap Bytes:
 // CHECK-NEXT: $1
 // CHECK-NEXT: Bitmap Byte Values:
-// CHECK-NEXT: 8
+// CHECK-NEXT: 0x4
 #include <stdio.h>
 #include <stdlib.h>
 extern int __llvm_profile_is_continuous_mode_enabled(void);