Joel E. Denny 3196763739 [FileCheck] Annotate input dump (6/7) ... This patch implements input annotations for diagnostics reporting CHECK-DAG discarded matches. These diagnostics are enabled by -vv. These annotations mark discarded match ranges using `!~~` because they are bad matches even though they are not errors. CHECK-DAG discarded matches create another case where there can be multiple match results for the same directive. For example: ``` $ FileCheck -dump-input=help The following description was requested by -dump-input=help to explain the input annotations printed by -dump-input=always and -dump-input=fail: - L: labels line number L of the input file - T:L labels the only match result for a pattern of type T from line L of the check file - T:L'N labels the Nth match result for a pattern of type T from line L of the check file - ^~~ marks good match (reported if -v) - !~~ marks bad match, such as: - CHECK-NEXT on same line as previous match (error) - CHECK-NOT found (error) - CHECK-DAG overlapping match (discarded, reported if -vv) - X~~ marks search range when no match is found, such as: - CHECK-NEXT not found (error) - CHECK-DAG not found after discarded matches (error) - ? marks fuzzy match when no match is found - colors success, error, fuzzy match, discarded match, unmatched input If you are not seeing color above or in input dumps, try: -color $ FileCheck -vv -dump-input=always check4 < input4 |& sed -n '/^<<<</,$p' <<<<<< 1: abcdef dag:1 ^~~~ dag:2'0 !~~~ discard: overlaps earlier match 2: cdefgh dag:2'1 ^~~~ check:3 X~ error: no match found >>>>>> $ cat check4 CHECK-DAG: abcd CHECK-DAG: cdef CHECK: efgh $ cat input4 abcdef cdefgh ``` This shows that the line 3 CHECK fails to match even though its pattern appears in the input because its search range starts after the line 2 CHECK-DAG's match range. The trouble might be that the line 2 CHECK-DAG's match range is later than expected because its first match range overlaps with the line 1 CHECK-DAG match range and thus is discarded. Because `!~~` for CHECK-DAG does not indicate an error, it is not colored red. Instead, when colors are enabled, it is colored cyan, which suggests a match that went cold. Reviewed By: george.karpenkov, probinson Differential Revision: https://reviews.llvm.org/D53898 llvm-svn: 349423		2018-12-18 00:03:19 +00:00
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llvm	[FileCheck] Annotate input dump (6/7)	2018-12-18 00:03:19 +00:00
llvm-c	[IR] Add a dedicated FNeg IR Instruction	2018-11-13 18:15:47 +00:00