llvm-project

4e1b9d34 - [mir-strip-debug] Fix debug location info strip for bundled instructions (#113676)

[mir-strip-debug] Fix debug location info strip for bundled instructions (#113676) Fix bug that `mir-strip-debug` pass does not remove debug location from bundled instructions. Problem arises during testing that debug info does not affect optimization passes output (`llvm-lit` with ` -Dllc="llc -debugify-and-strip-all-safe"`), when pass operates on MIR with bundled instructions + memory operands. Let mir test check looks like: ``` CHECK-NEXT: BUNDLE { CHECK-NEXT: $r3 = LD $r1, $r2 :: (load (s64) from %ir.a, !tbaa !2) CHECK-NEXT: } ``` So as `mir-strip-debug` pass does not process bundled instructions, running `llc -debugify-and-strip-all-safe` on the test will produce the following output: ``` BUNDLE { $r3 = LD $r1, $r2, debug-location !DILocation(line: 3, column: 1, scope: <0x608cb2b99b10>) :: (load (s64) from %ir.a, !tbaa !2) } ``` And test will fail, but it shouldn't. Seems like the root cause is that `mir-strip-debug` pass should remove debug location from bundled instructions.