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Add speculatable function attribute

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This attribute tells the optimizer that the function may be speculated.

Patch by Tom Stellard

llvm-svn: 301680
This commit is contained in:
Matt Arsenault
2017-04-28 20:25:27 +00:00
parent 744c215e29
commit b19b57ea60
19 changed files with 133 additions and 18 deletions
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3
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -1119,6 +1119,7 @@ static uint64_t getRawAttributeMask(Attribute::AttrKind Val) {
case Attribute::SwiftSelf: return 1ULL << 51;
case Attribute::SwiftError: return 1ULL << 52;
case Attribute::WriteOnly: return 1ULL << 53;
case Attribute::Speculatable: return 1ULL << 54;
case Attribute::Dereferenceable:
llvm_unreachable("dereferenceable attribute not supported in raw format");
break;
@@ -1315,6 +1316,8 @@ static Attribute::AttrKind getAttrFromCode(uint64_t Code) {
return Attribute::ReturnsTwice;
case bitc::ATTR_KIND_S_EXT:
return Attribute::SExt;
case bitc::ATTR_KIND_SPECULATABLE:
return Attribute::Speculatable;
case bitc::ATTR_KIND_STACK_ALIGNMENT:
return Attribute::StackAlignment;
case bitc::ATTR_KIND_STACK_PROTECT: