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8040121: Load variable through a pointer of an incompatible type in src/hotspot/src/share/vm: opto/output.cpp, runtime/sharedRuntimeTrans.cpp, utilities/globalDefinitions_visCPP.hpp

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Fixed parfait warnings in globalDefinitions files by using a union for casts.

Reviewed-by: kvn
This commit is contained in:
Tobias Hartmann 2014-07-29 13:54:16 +02:00
parent e8d1955b5e
commit d2a5b70cdf
6 changed files with 27 additions and 46 deletions
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21
hotspot/src/share/vm/utilities/globalDefinitions.hpp
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@ -558,6 +558,27 @@ inline double fabsd(double value) {
return fabs(value);
}
//----------------------------------------------------------------------------------------------------
// Special casts
// Cast floats into same-size integers and vice-versa w/o changing bit-pattern
typedef union {
jfloat f;
jint i;
} FloatIntConv;
typedef union {
jdouble d;
jlong l;
julong ul;
} DoubleLongConv;
inline jint jint_cast (jfloat x) { return ((FloatIntConv*)&x)->i; }
inline jfloat jfloat_cast (jint x) { return ((FloatIntConv*)&x)->f; }
inline jlong jlong_cast (jdouble x) { return ((DoubleLongConv*)&x)->l; }
inline julong julong_cast (jdouble x) { return ((DoubleLongConv*)&x)->ul; }
inline jdouble jdouble_cast (jlong x) { return ((DoubleLongConv*)&x)->d; }
inline jint low (jlong value) { return jint(value); }
inline jint high(jlong value) { return jint(value >> 32); }