rsmith added inline comments.
================
Comment at: clang/include/clang/Driver/Options.td:2004-2007
+def mspeculative_load_hardening : Flag<["-"], "mspeculative-load-hardening">,
+ Group<m_Group>, Flags<[CoreOption,CC1Option]>;
+def mno_speculative_load_hardening : Flag<["-"],
"mno-speculative-load-hardening">,
+ Group<m_Group>, Flags<[CoreOption,CC1Option]>;
----------------
We usually only provide `-cc1` flags to switch into the non-default state.
================
Comment at: clang/include/clang/Frontend/CodeGenOptions.def:214
CODEGENOPT(SoftFloat , 1, 0) ///< -soft-float.
+CODEGENOPT(SpeculativeLoadHardening, 1, 0) ///< Enable
speculative_load_hardening.
CODEGENOPT(FineGrainedBitfieldAccesses, 1, 0) ///< Enable fine-grained
bitfield accesses.
----------------
Spaces rather than underscores here.
================
Comment at: clang/lib/Driver/ToolChains/Arch/X86.cpp:169-170
options::OPT_mno_retpoline_external_thunk, false)) {
// FIXME: Add a warning about failing to specify `-mretpoline` and
// eventually switch to an error here.
Features.push_back("+retpoline-indirect-calls");
----------------
`-mspeculative-load-hardening -mretpoline-external-thunk` does not enable
`+retpoline-indirect-branches` (but `-mretpoline-external-thunk` by itself
does). Is that intentional?
================
Comment at: llvm/lib/Bitcode/Reader/BitcodeReader.cpp:1169
+ case Attribute::SpeculativeLoadHardening:
+ return 1ULL << 60;
case Attribute::Dereferenceable:
----------------
rnk wrote:
> These appear to repeat LLVMBitcodes.h, unless I am mistaken. Weird. Anyway,
> fixing that is out of scope.
The values "above the fold" in Phabricator aren't all the same as the enum
value plus one. *shrug*
Repository:
rL LLVM
https://reviews.llvm.org/D51157
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