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6910664: C2: java/util/Arrays/Sorting.java fails with DeoptimizeALot flag

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Matcher::float_in_double should be true only when FPU is used for floats.

Reviewed-by: never, twisti
This commit is contained in:
Vladimir Kozlov 2010-02-19 10:04:16 -08:00
parent 3e1688a8cd
commit fa2d360cd5
5 changed files with 14 additions and 9 deletions
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5
hotspot/src/cpu/sparc/vm/sparc.ad
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@ -1803,8 +1803,9 @@ void Matcher::pd_implicit_null_fixup(MachNode *node, uint idx) {
// to implement the UseStrictFP mode.
const bool Matcher::strict_fp_requires_explicit_rounding = false;
// Do floats take an entire double register or just half?
const bool Matcher::float_in_double = false;
// Are floats conerted to double when stored to stack during deoptimization?
// Sparc does not handle callee-save floats.
bool Matcher::float_in_double() { return false; }
// Do ints take an entire long register or just half?
// Note that we if-def off of _LP64.

6
hotspot/src/cpu/x86/vm/x86_32.ad
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@ -1444,8 +1444,10 @@ void Matcher::pd_implicit_null_fixup(MachNode *node, uint idx) {
// to implement the UseStrictFP mode.
const bool Matcher::strict_fp_requires_explicit_rounding = true;
// Do floats take an entire double register or just half?
const bool Matcher::float_in_double = true;
// Are floats conerted to double when stored to stack during deoptimization?
// On x32 it is stored with convertion only when FPU is used for floats.
bool Matcher::float_in_double() { return (UseSSE == 0); }
// Do ints take an entire long register or just half?
const bool Matcher::int_in_long = false;

6
hotspot/src/cpu/x86/vm/x86_64.ad
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@ -2074,8 +2074,10 @@ void Matcher::pd_implicit_null_fixup(MachNode *node, uint idx) {}
// implement the UseStrictFP mode.
const bool Matcher::strict_fp_requires_explicit_rounding = true;
// Do floats take an entire double register or just half?
const bool Matcher::float_in_double = true;
// Are floats conerted to double when stored to stack during deoptimization?
// On x64 it is stored without convertion so we can use normal access.
bool Matcher::float_in_double() { return false; }
// Do ints take an entire long register or just half?
const bool Matcher::int_in_long = true;

4
hotspot/src/share/vm/opto/matcher.hpp
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@ -373,8 +373,8 @@ public:
// to implement the UseStrictFP mode.
static const bool strict_fp_requires_explicit_rounding;
// Do floats take an entire double register or just half?
static const bool float_in_double;
// Are floats conerted to double when stored to stack during deoptimization?
static bool float_in_double();
// Do ints take an entire long register or just half?
static const bool int_in_long;

2
hotspot/src/share/vm/opto/output.cpp
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@ -678,7 +678,7 @@ void Compile::FillLocArray( int idx, MachSafePointNode* sfpt, Node *local,
#endif //_LP64
else if( (t->base() == Type::FloatBot || t->base() == Type::FloatCon) &&
OptoReg::is_reg(regnum) ) {
array->append(new_loc_value( _regalloc, regnum, Matcher::float_in_double
array->append(new_loc_value( _regalloc, regnum, Matcher::float_in_double()
? Location::float_in_dbl : Location::normal ));
} else if( t->base() == Type::Int && OptoReg::is_reg(regnum) ) {
array->append(new_loc_value( _regalloc, regnum, Matcher::int_in_long