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| author | Joe Richey <joerichey@google.com> | 2020-10-26 03:46:54 -0700 |
|---|---|---|
| committer | Joe Richey <joerichey@google.com> | 2020-10-26 03:46:54 -0700 |
| commit | ad552bc17e9e494e039f3db180d4e63be44fe889 (patch) | |
| tree | c4da6484ef1f97be8927e8b96b6dc115ed1ddb70 /compiler/rustc_codegen_ssa/src | |
| parent | 8e6f69afc9b0943003ce51a53d1f59611e6601a3 (diff) | |
| download | rust-ad552bc17e9e494e039f3db180d4e63be44fe889.tar.gz rust-ad552bc17e9e494e039f3db180d4e63be44fe889.zip | |
Add compiler support for LLVM's x86 ERMSB feature
This change is needed for compiler-builtins to check for this feature when implementing memcpy/memset. See: https://github.com/rust-lang/compiler-builtins/pull/365 The change just does compile-time detection. I think that runtime detection will have to come in a follow-up CL to std-detect. Like all the CPU feature flags, this just references #44839 Signed-off-by: Joe Richey <joerichey@google.com>
Diffstat (limited to 'compiler/rustc_codegen_ssa/src')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/target_features.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/target_features.rs b/compiler/rustc_codegen_ssa/src/target_features.rs index a8d88a95f7a..000ddf42604 100644 --- a/compiler/rustc_codegen_ssa/src/target_features.rs +++ b/compiler/rustc_codegen_ssa/src/target_features.rs @@ -63,6 +63,7 @@ const X86_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[ ("bmi1", None), ("bmi2", None), ("cmpxchg16b", Some(sym::cmpxchg16b_target_feature)), + ("ermsb", Some(sym::ermsb_target_feature)), ("f16c", Some(sym::f16c_target_feature)), ("fma", None), ("fxsr", None), |