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2 Commits

Author SHA1 Message Date
Fangrui Song
5932f7b8f2 [PatchableFunction] Use an empty DebugLoc 
The current FirstMI.getDebugLoc() is actually null in almost all cases.
If it isn't, the generated .loc will be considered initial. The .loc
will have the prologue_end flag and terminate the prologue prematurely.

Also use an overload of BuildMI that will not prepend
PATCHABLE_FUNCTION_ENTRY to a MachineInstr bundle.
 2020-02-01 14:12:06 -08:00
Fangrui Song
50a3ff30e1 [PatchableFunction] Allow empty entry MachineBasicBlock 
Reviewed By: nickdesaulniers

Differential Revision: https://reviews.llvm.org/D73301
 2020-01-24 09:42:48 -08:00