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Fix PR11370 for real. Prevents converting 256-bit FP instruction to AVX2 256-bit integer instructions when AVX2 isn't enabled.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144629 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2011-11-15 06:39:01 +00:00
parent f178418729
commit 44ec9fddc2
1 changed files with 17 additions and 9 deletions
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26
lib/Target/X86/X86InstrInfo.cpp
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@ -3573,14 +3573,17 @@ static const unsigned ReplaceableInstrsAVX2[][3] = {
// FIXME: Some shuffle and unpack instructions have equivalents in different
// domains, but they require a bit more work than just switching opcodes.
static const unsigned *lookup(unsigned opcode, unsigned domain, bool hasAVX2) {
static const unsigned *lookup(unsigned opcode, unsigned domain) {
for (unsigned i = 0, e = array_lengthof(ReplaceableInstrs); i != e; ++i)
if (ReplaceableInstrs[i][domain-1] == opcode)
return ReplaceableInstrs[i];
if (domain != 3 || hasAVX2) // only use PackedInt domain if AVX2 is enabled
for (unsigned i = 0, e = array_lengthof(ReplaceableInstrsAVX2); i != e; ++i)
if (ReplaceableInstrsAVX2[i][domain-1] == opcode)
return ReplaceableInstrsAVX2[i];
return 0;
}
static const unsigned *lookupAVX2(unsigned opcode, unsigned domain) {
for (unsigned i = 0, e = array_lengthof(ReplaceableInstrsAVX2); i != e; ++i)
if (ReplaceableInstrsAVX2[i][domain-1] == opcode)
return ReplaceableInstrsAVX2[i];
return 0;
}
@ -3588,16 +3591,21 @@ std::pair<uint16_t, uint16_t>
X86InstrInfo::getExecutionDomain(const MachineInstr *MI) const {
uint16_t domain = (MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
bool hasAVX2 = TM.getSubtarget<X86Subtarget>().hasAVX2();
return std::make_pair(domain,
domain && lookup(MI->getOpcode(), domain, hasAVX2) ? 0xe : 0);
uint16_t validDomains = 0;
if (domain && lookup(MI->getOpcode(), domain))
validDomains = 0xe;
else if (domain && lookupAVX2(MI->getOpcode(), domain))
validDomains = hasAVX2 ? 0xe : 0x6;
return std::make_pair(domain, validDomains);
}
void X86InstrInfo::setExecutionDomain(MachineInstr *MI, unsigned Domain) const {
assert(Domain>0 && Domain<4 && "Invalid execution domain");
uint16_t dom = (MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
assert(dom && "Not an SSE instruction");
bool hasAVX2 = TM.getSubtarget<X86Subtarget>().hasAVX2();
const unsigned *table = lookup(MI->getOpcode(), dom, hasAVX2);
const unsigned *table = lookup(MI->getOpcode(), dom);
if (!table) // try the other table
table = lookupAVX2(MI->getOpcode(), dom);
assert(table && "Cannot change domain");
MI->setDesc(get(table[Domain-1]));
}