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Commit 17ff23c7 authored by Benjamin Kramer's avatar Benjamin Kramer
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Speed up BCPL comment lexing by looking aggressively for newlines and then... 

Speed up BCPL comment lexing by looking aggressively for newlines and then scannig backwards to see if the newline is escaped.

3% speedup in preprocessing all of clang with -Eonly. Also includes a small testcase for coverage.

llvm-svn: 139116
parent dbfb18a0
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