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from e87212ead5e RISC-V: zicond: Fix opt2 pattern new c24982689b8 c++: Diagnose [basic.scope.block]/2 violations even in comp [...] new efafa66c294 c++: Diagnose [basic.scope.block]/2 violations even for blo [...]

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Summary of changes: gcc/cp/decl.cc | 1 + gcc/cp/name-lookup.cc | 77 +++++--- gcc/cp/name-lookup.h | 12 +- gcc/cp/semantics.cc | 1 + gcc/testsuite/g++.dg/diagnostic/redeclaration-1.C | 2 +- gcc/testsuite/g++.dg/diagnostic/redeclaration-3.C | 225 ++++++++++++++++++++++ gcc/testsuite/g++.dg/diagnostic/redeclaration-4.C | 167 ++++++++++++++++ gcc/testsuite/g++.dg/diagnostic/redeclaration-5.C | 167 ++++++++++++++++ gcc/testsuite/g++.dg/parse/pr31952-1.C | 2 +- gcc/testsuite/g++.dg/parse/pr31952-3.C | 2 +- gcc/testsuite/g++.dg/warn/Wshadow-19.C | 27 +++ 11 files changed, 644 insertions(+), 39 deletions(-) create mode 100644 gcc/testsuite/g++.dg/diagnostic/redeclaration-3.C create mode 100644 gcc/testsuite/g++.dg/diagnostic/redeclaration-4.C create mode 100644 gcc/testsuite/g++.dg/diagnostic/redeclaration-5.C create mode 100644 gcc/testsuite/g++.dg/warn/Wshadow-19.C