[PATCH] D38140: [DebugInfo] Do not extend range for physreg in LiveDebugVariables

[Reid Kleckner via Phabricator via llvm-commits]

rnk added inline comments.


================
Comment at: test/DebugInfo/MIR/X86/live-debug-vars-unused-arg.mir:151
+#
+# CHECK-LABEL: ********** EMITTING LIVE DEBUG VARIABLES **********
+# CHECK-NEXT: !"argc,5"        [0B;0e):0 Loc0=%EDI
----------------
I think this is testable with dwarfdump. The range for argc should run exactly up until it is clobbered by a0, so the location lists will look like:
```
DW_TAG_formal_parameter
  DW_AT_location (0xNNN
    0x000 - [[SET_RDI:0x.*]]: RDI)
  DW_AT_name: "argc"
DW_TAG_variable
  DW_AT_location (0xNNN
    [[SET_RDI]] - {{.*}}: RDI)
  DW_AT_name: "a0"
```


https://reviews.llvm.org/D38140