e1ffd49165
Change the check for constant-conversion with width-1 bitfields so it doesn't suppress quite as many cases. Based off a testcase in the gcc testsuite.
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llvm-svn: 149572
2012-02-02 00:40:20 +00:00
66b6395dd5
Turn off implicit truncation warning for compound assignment to bitfields; it might be reasonable in some cases, but it clearly doesn't make sense in some cases, like the included testcase.
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<rdar://problem/10238797>, part 2.
llvm-svn: 149095
2012-01-26 23:34:06 +00:00
c267a32b05
Make the bitfield implicit truncation warning slightly more aggressive, and make the printed warning a bit more accurate. The new behavior matches gcc's -Wconversion. <rdar://problem/10238797>.
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llvm-svn: 149089
2012-01-26 23:11:39 +00:00
33ba99566f
Only emit implicit constant conversion truncation warnings in reachable code. Apparently this is what GCC does, and some code depends on this. Fixes <rdar://problem/10321089>.
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llvm-svn: 142716
2011-10-22 02:37:33 +00:00
deebbcf20d
Undo a refactor-o and base the bitfield-truncation warning on the
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uncoerced value. Also, whitelist bool bitfields, which aren't
really a truncation.
llvm-svn: 118778
2010-11-11 05:33:51 +00:00
1f425648ca
Extend the bitfield-truncation warning to initializations.
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rdar://problem/8652606
llvm-svn: 118773
2010-11-11 03:21:53 +00:00
817d4af557
When -Wconversion computes the range of a type, it uses the (bit-)range
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of the enumerators rather than the actual expressible range. This is
great when dealing with opaque *values* of that type, but when computing
the range of the type for purposes of converting *into* it, it produces
warnings in cases we don't care about (e.g. enum_t x = 500;). Divide
the logic into these two cases and use the more conservative range for
targets.
llvm-svn: 118735
2010-11-10 23:38:19 +00:00
fd81c52947
Tweak to bitfield-overflow warning: don't warn about storing
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a positive value into a signed bitfield of the exact width of
the value.
llvm-svn: 118657
2010-11-10 00:26:50 +00:00
0e6cfaf6c0
Typo.
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llvm-svn: 118649
2010-11-09 23:36:43 +00:00
d2a5312e14
Add a warning for implicit truncation of constant values due to
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bitfield assignment.
Implements rdar://problem/7809123
llvm-svn: 118647
2010-11-09 23:24:47 +00:00
18a2c2c0b9
Split out -Wconversion warnings about constant precision into their
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own subcategory, -Wconstant-conversion, which is on by default.
Tweak the constant folder to give better results in the invalid
case of a negative shift amount.
Implements rdar://problem/6792488
llvm-svn: 118636
2010-11-09 22:22:12 +00:00
Eli Friedman