[clang] [llvm] [X86] Support branch hint (PR #97721)
Shengchen Kan via cfe-commits
cfe-commits at lists.llvm.org
Thu Jul 4 06:51:59 PDT 2024
================
@@ -749,6 +749,11 @@ def TuningUseGLMDivSqrtCosts
: SubtargetFeature<"use-glm-div-sqrt-costs", "UseGLMDivSqrtCosts", "true",
"Use Goldmont specific floating point div/sqrt costs">;
+// Starting with Redwood Cove architecture, the branch has branch taken hint
+// (i.e., instruction prefix 3EH).
+def TuningBranchHint: SubtargetFeature<"branch-hint", "HasBranchHint", "true",
----------------
KanRobert wrote:
We can always add `0x3e` to JCC in 64-bit mode. So it does work on all applicable CPUs.
https://github.com/llvm/llvm-project/pull/97721
More information about the cfe-commits
mailing list