[X86] Remove redundant declarations (NFC)

[kazutakahirata]

In C++17, static constexpr members are implicitly inline, so they no
longer require an out-of-line definition.

Identified with readability-redundant-declaration.

[llvmbot]

@llvm/pr-subscribers-backend-x86

Author: Kazu Hirata (kazutakahirata)

Changes

In C++17, static constexpr members are implicitly inline, so they no
longer require an out-of-line definition.

Identified with readability-redundant-declaration.

---

Full diff: https://github.com/llvm/llvm-project/pull/166107.diff

1 Files Affected:

• (modified) llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp (-3)

diff --git a/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp b/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp
index b655183b6b49b..3b96e706fb607 100644
--- a/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp
+++ b/llvm/lib/Target/X86/X86LoadValueInjectionLoadHardening.cpp
@@ -227,9 +227,6 @@ struct DOTGraphTraits<MachineGadgetGraph *> : DefaultDOTGraphTraits {
 
 } // end namespace llvm
 
-constexpr MachineInstr *MachineGadgetGraph::ArgNodeSentinel;
-constexpr int MachineGadgetGraph::GadgetEdgeSentinel;
-
 char X86LoadValueInjectionLoadHardeningPass::ID = 0;
 
 void X86LoadValueInjectionLoadHardeningPass::getAnalysisUsage(