This patch series includes some improvements to complex lowering, all related to cabs. History of the cabs folding cabs folding was originally add in builtins.c ( and 4.3 [r0-78875-gd1ad84c20452e6]) The expansion to `sqrt(r*r+i*i)` added to cse sincos pass in GCC 4.7 (r0-109444-gd7e2a1c13835e7) to fix an lto issue where `r*r` would be convert into `pow(r, 2.0)` after the cse_sincos pass (which at the time also did pow expansion). The other cabs folding for the constant/same value optimization was moved to match in GCC 6 (r6-4111-gabcc43f5323869). This series moves all possible cabs expansion/simplifications to complex lowering which already has a decent lattice and folding which allows `cabs(x+xI)` and `cabs(x+0.0I)` and `cabs(0.0+xI)` be detected.
Andrew Pinski (4): Small optimization for complex addition, real/imag parts the same Move cabs expansion from powcabs to complex lowering [PR115710] Add some optimizations to gimple_expand_builtin_cabs Rename expand_powcabs pass to expand_pow gcc/passes.def | 2 +- gcc/testsuite/gcc.dg/pow-sqrt-synth-1.c | 4 +- gcc/testsuite/gcc.dg/tree-ssa/cabs-1.c | 14 +++ gcc/testsuite/gcc.dg/tree-ssa/cabs-2.c | 13 +++ gcc/testsuite/gcc.dg/tree-ssa/cabs-3.c | 24 +++++ gcc/testsuite/gcc.dg/tree-ssa/cabs-4.c | 16 +++ gcc/testsuite/gcc.dg/tree-ssa/cabs-5.c | 22 ++++ gcc/testsuite/gcc.dg/tree-ssa/cabs-6.c | 16 +++ gcc/testsuite/gcc.dg/tree-ssa/complex-8.c | 12 +++ gcc/testsuite/gfortran.dg/vect/pr115710.f90 | 18 ++++ gcc/timevar.def | 2 +- gcc/tree-complex.cc | 109 +++++++++++++++++++- gcc/tree-pass.h | 2 +- gcc/tree-ssa-math-opts.cc | 91 +++------------- 14 files changed, 258 insertions(+), 87 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cabs-1.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cabs-2.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cabs-3.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cabs-4.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cabs-5.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cabs-6.c create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/complex-8.c create mode 100644 gcc/testsuite/gfortran.dg/vect/pr115710.f90 -- 2.43.0
