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from dda98ae avoid generation of empty guards in trivial cases new 7fc2f61 Add a pass to back-propagate use information new 4616363 Remove fold_strip_sign_ops
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Summary of changes: gcc/ChangeLog | 25 + gcc/Makefile.in | 1 + gcc/builtins.c | 129 +-- gcc/common.opt | 4 + gcc/doc/invoke.texi | 23 +- gcc/fold-const.c | 99 +-- gcc/fold-const.h | 2 +- gcc/gimple-ssa-backprop.c | 956 +++++++++++++++++++++ gcc/passes.def | 1 + gcc/testsuite/ChangeLog | 10 + gcc/testsuite/gcc.dg/torture/builtin-symmetric-1.c | 1 + gcc/testsuite/gcc.dg/tree-ssa/backprop-1.c | 22 + gcc/testsuite/gcc.dg/tree-ssa/backprop-2.c | 21 + gcc/testsuite/gcc.dg/tree-ssa/backprop-3.c | 21 + gcc/testsuite/gcc.dg/tree-ssa/backprop-4.c | 21 + gcc/testsuite/gcc.dg/tree-ssa/backprop-5.c | 20 + gcc/testsuite/gcc.dg/tree-ssa/backprop-6.c | 30 + gcc/timevar.def | 1 + gcc/tree-pass.h | 1 + 19 files changed, 1175 insertions(+), 213 deletions(-) create mode 100644 gcc/gimple-ssa-backprop.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/backprop-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/backprop-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/backprop-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/backprop-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/backprop-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/backprop-6.c