[Webkit-unassigned] [Bug 163869] New: GCC warning in testb3.cpp testAbsArgWithEffectfulDoubleConversion

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163869

            Bug ID: 163869
           Summary: GCC warning in testb3.cpp
                    testAbsArgWithEffectfulDoubleConversion
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com
                CC: ggaren at apple.com, keith_miller at apple.com

Since r207696 "Expand Trunc in B3 to support Double to Float":

[284/3418] Building CXX object Source/...akeFiles/testb3.dir/__/b3/testb3.cpp.o
../../Source/JavaScriptCore/b3/testb3.cpp: In function ‘void {anonymous}::testAbsArgWithEffectfulDoubleConversion(float)’:
../../Source/JavaScriptCore/b3/testb3.cpp:3832:38: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second:
     CHECK(isIdentical(effect, fabs(a)));
                                      ^
../../Source/JavaScriptCore/b3/testb3.cpp:100:16: note: in definition of macro ‘CHECK’
         if (!!(x))                                                      \
                ^
In file included from ../../Source/JavaScriptCore/b3/air/AirArg.h:31:0,
                 from ../../Source/JavaScriptCore/b3/air/AirCode.h:30,
                 from ../../Source/JavaScriptCore/b3/testb3.cpp:28:
../../Source/JavaScriptCore/b3/B3Common.h:67:13: note: candidate 1: bool JSC::B3::isIdentical(double, double)
 inline bool isIdentical(double left, double right)
             ^~~~~~~~~~~
../../Source/JavaScriptCore/b3/B3Common.h:72:13: note: candidate 2: bool JSC::B3::isIdentical(float, float)
 inline bool isIdentical(float left, float right)
             ^~~~~~~~~~~
../../Source/JavaScriptCore/b3/testb3.cpp: In function ‘void {anonymous}::testSqrtArgWithEffectfulDoubleConversion(float)’:
../../Source/JavaScriptCore/b3/testb3.cpp:4336:38: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second:
     CHECK(isIdentical(effect, sqrt(a)));
                                      ^
../../Source/JavaScriptCore/b3/testb3.cpp:100:16: note: in definition of macro ‘CHECK’
         if (!!(x))                                                      \
                ^
In file included from ../../Source/JavaScriptCore/b3/air/AirArg.h:31:0,
                 from ../../Source/JavaScriptCore/b3/air/AirCode.h:30,
                 from ../../Source/JavaScriptCore/b3/testb3.cpp:28:
../../Source/JavaScriptCore/b3/B3Common.h:67:13: note: candidate 1: bool JSC::B3::isIdentical(double, double)
 inline bool isIdentical(double left, double right)
             ^~~~~~~~~~~
../../Source/JavaScriptCore/b3/B3Common.h:72:13: note: candidate 2: bool JSC::B3::isIdentical(float, float)
 inline bool isIdentical(float left, float right)
             ^~~~~~~~~~~

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