Revert "If -fslp-vectorize or -fno-slp-vectorize are given, honor this selection. If no flag is given, enable it for -O3."
This reverts commit r187630. Looks like it is breaking the bots. llvm-svn: 187633
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@ -1974,12 +1974,6 @@ static bool isOptimizationLevelFast(const ArgList &Args) {
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return false;
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}
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static bool isOptimizationLevel3(const ArgList &Args) {
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if (Arg *A = Args.getLastArg(options::OPT_O_Group))
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return StringRef(A->getValue()).equals("3");
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return false;
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}
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void Clang::ConstructJob(Compilation &C, const JobAction &JA,
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const InputInfo &Output,
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const InputInfoList &Inputs,
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@ -3458,17 +3452,9 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
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options::OPT_fno_vectorize, true))
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CmdArgs.push_back("-vectorize-loops");
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bool EnableSLP = false;
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// If -fslp-vectorize or -fno-slp-vectorize are given, honor this selection.
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if (Arg *A = Args.getLastArg(options::OPT_fslp_vectorize,
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options::OPT_fno_slp_vectorize)) {
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EnableSLP = A->getOption().matches(options::OPT_fslp_vectorize);
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} else {
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// Also enable SLP vectorization on O3 or OFast
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EnableSLP = isOptimizationLevel3(Args) || isOptimizationLevelFast(Args);
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}
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if (EnableSLP)
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// -fslp-vectorize is default.
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if (Args.hasFlag(options::OPT_fslp_vectorize,
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options::OPT_fno_slp_vectorize, true))
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CmdArgs.push_back("-vectorize-slp");
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// -fno-slp-vectorize-aggressive is default.
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