m4: bump for improved vectorisation and devirtualisation
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@ -23,4 +23,5 @@ AC_DEFUN([NC_CXX],[
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[])],
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[])],
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[], [AC_DEFINE([final], [], [Pretend about final keyword support])])
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[], [AC_DEFINE([final], [], [Pretend about final keyword support])])
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AX_APPEND_COMPILE_FLAGS([-fvisibility=hidden], [], [-Werror])
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])
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])
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@ -54,6 +54,8 @@ AC_DEFUN([NC_OPTIMISATION],[
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)
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)
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AX_APPEND_COMPILE_FLAGS([-pipe])
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AX_APPEND_COMPILE_FLAGS([-pipe])
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# base instruction set requirements for x86
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AX_APPEND_COMPILE_FLAGS([-mfpmath=sse], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-mfpmath=sse], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-msahf], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-msahf], [], [-Werror])
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@ -61,30 +63,34 @@ AC_DEFUN([NC_OPTIMISATION],[
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## Enable aggressive code generation optimisations
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## Enable aggressive code generation optimisations
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AS_IF([test "x$enable_debugging" != "xyes"], [
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AS_IF([test "x$enable_debugging" != "xyes"], [
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribute-patterns], [], [-Werror])
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# gcc vectorisation
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-if-convert-stores], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-vectorize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-vectorize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-funsafe-loop-optimizations], [], [-Werror])
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# gcc >= 4.8 defaults to enabling stack-protector, we care more about
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# clang vectorisation
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# performance than security.
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AX_APPEND_COMPILE_FLAGS([-fvectorize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fno-stack-protector], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fslp-vectorize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fslp-vectorize-aggressive], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-linear], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-floop-interchange], [], [-Werror])
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# loop hosting/distribution
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribute-patterns], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribution], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribution], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribute-patterns], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-if-convert-stores], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-vectorize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ftree-loop-linear], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-funsafe-loop-optimizations], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-floop-interchange], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-floop-interchange], [], [-Werror])
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# safety removal for performance
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AX_APPEND_COMPILE_FLAGS([-fno-stack-protector], [], [-Werror])
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])
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])
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##-------------------------------------------------------------------------
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##-------------------------------------------------------------------------
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## Enable code size optimisations (that don't impact performance)
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## Enable code size optimisations (that don't impact performance)
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## Note: we assume CXX, and that CXXLINK is g++ not ld, hence the -Wl opt
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## Note: we assume CXX, and that CXXLINK is g++ not ld, hence the -Wl opt
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AS_IF([test "x$enable_debugging" != "xyes"], [
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AS_IF([test "x$enable_debugging" != "xyes"], [
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AX_APPEND_COMPILE_FLAGS([-fdevirtualize], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fdevirtualize-speculatively], [], [-Werror])
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AX_CHECK_LINK_FLAG([-Wl,--gc-sections], [
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AX_CHECK_LINK_FLAG([-Wl,--gc-sections], [
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AX_APPEND_COMPILE_FLAGS([-fdata-sections], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fdata-sections], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ffunction-sections], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-ffunction-sections], [], [-Werror])
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