diff options
author | Hans Wennborg <hans@hanshq.net> | 2018-01-30 10:43:43 +0000 |
---|---|---|
committer | Hans Wennborg <hans@hanshq.net> | 2018-01-30 10:43:43 +0000 |
commit | b3a6ebf0b9344f321cc35ed43dd8d8915f2eb26b (patch) | |
tree | ea5bba56e0a22881160aa487f948cc150c324db3 /lib/Driver | |
parent | f685e442bc0cef1796890d68ec4df83d8c581a43 (diff) |
Merging r323485:
------------------------------------------------------------------------
r323485 | aemerson | 2018-01-26 01:27:22 +0100 (Fri, 26 Jan 2018) | 3 lines
[Driver] Add an -fexperimental-isel driver option to enable/disable GlobalISel.
Differential Revision: https://reviews.llvm.org/D42276
------------------------------------------------------------------------
git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_60@323745 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Driver')
-rw-r--r-- | lib/Driver/ToolChains/Clang.cpp | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/Driver/ToolChains/Clang.cpp b/lib/Driver/ToolChains/Clang.cpp index c445669a5a..484df52001 100644 --- a/lib/Driver/ToolChains/Clang.cpp +++ b/lib/Driver/ToolChains/Clang.cpp @@ -4639,6 +4639,37 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA, CmdArgs.push_back("-fwhole-program-vtables"); } + if (Arg *A = Args.getLastArg(options::OPT_fexperimental_isel, + options::OPT_fno_experimental_isel)) { + CmdArgs.push_back("-mllvm"); + if (A->getOption().matches(options::OPT_fexperimental_isel)) { + CmdArgs.push_back("-global-isel=1"); + + // GISel is on by default on AArch64 -O0, so don't bother adding + // the fallback remarks for it. Other combinations will add a warning of + // some kind. + bool IsArchSupported = Triple.getArch() == llvm::Triple::aarch64; + bool IsOptLevelSupported = false; + + Arg *A = Args.getLastArg(options::OPT_O_Group); + if (Triple.getArch() == llvm::Triple::aarch64) { + if (!A || A->getOption().matches(options::OPT_O0)) + IsOptLevelSupported = true; + } + if (!IsArchSupported || !IsOptLevelSupported) { + CmdArgs.push_back("-mllvm"); + CmdArgs.push_back("-global-isel-abort=2"); + + if (!IsArchSupported) + D.Diag(diag::warn_drv_experimental_isel_incomplete) << Triple.getArchName(); + else + D.Diag(diag::warn_drv_experimental_isel_incomplete_opt); + } + } else { + CmdArgs.push_back("-global-isel=0"); + } + } + // Finally add the compile command to the compilation. if (Args.hasArg(options::OPT__SLASH_fallback) && Output.getType() == types::TY_Object && |