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from 77d8139 Define cxx11-abi effective target for libstdc++ tests new 7928621 PR tree-optimization/33562 PR tree-optimization/61912 PR t [...] new 6412313 PR tree-optimization/33562 PR tree-optimizati [...] new 56ce87e PR tree-optimization/61912 PR tree-optimization/77485 * tr [...]

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Summary of changes: gcc/ChangeLog | 39 ++ gcc/doc/invoke.texi | 4 + gcc/params.def | 5 + gcc/sbitmap.c | 164 +++++++ gcc/sbitmap.h | 3 + gcc/testsuite/ChangeLog | 19 + gcc/testsuite/g++.dg/tree-ssa/ssa-dse-1.C | 101 +++++ gcc/testsuite/gcc.dg/tree-ssa/complex-4.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/complex-5.c | 2 +- gcc/testsuite/gcc.dg/tree-ssa/pr30375.c | 3 +- .../gcc.dg/tree-ssa/{complex-4.c => ssa-dse-18.c} | 6 +- .../gcc.dg/tree-ssa/{complex-4.c => ssa-dse-19.c} | 6 +- .../gcc.dg/tree-ssa/{complex-5.c => ssa-dse-20.c} | 6 +- .../gcc.dg/tree-ssa/{complex-5.c => ssa-dse-21.c} | 5 +- gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-24.c | 62 +++ gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-9.c | 2 +- gcc/tree-ssa-dse.c | 494 ++++++++++++++++++--- 17 files changed, 840 insertions(+), 83 deletions(-) create mode 100644 gcc/testsuite/g++.dg/tree-ssa/ssa-dse-1.C copy gcc/testsuite/gcc.dg/tree-ssa/{complex-4.c => ssa-dse-18.c} (60%) copy gcc/testsuite/gcc.dg/tree-ssa/{complex-4.c => ssa-dse-19.c} (60%) copy gcc/testsuite/gcc.dg/tree-ssa/{complex-5.c => ssa-dse-20.c} (57%) copy gcc/testsuite/gcc.dg/tree-ssa/{complex-5.c => ssa-dse-21.c} (57%) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-24.c