https://github.com/jhuber6 created https://github.com/llvm/llvm-project/pull/202699
Summary: The previous changes to LTO made the flto flag passed by default which overrode the hack we did to ervert to the old non-LTO pipline. This is a temporary hack so I'm hacking it even further to fix it. >From 53dde9652e2e416feb997f445c7480327cc0f55f Mon Sep 17 00:00:00 2001 From: Joseph Huber <[email protected]> Date: Tue, 9 Jun 2026 10:53:33 -0500 Subject: [PATCH] [HIP] Fix `-flto` overriding `--no-lto` not that it is default Summary: The previous changes to LTO made the flto flag passed by default which overrode the hack we did to ervert to the old non-LTO pipline. This is a temporary hack so I'm hacking it even further to fix it. --- .../clang-linker-wrapper/ClangLinkerWrapper.cpp | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp b/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp index 6e4fc7060389c..cfdd11e1d298d 100644 --- a/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp +++ b/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp @@ -534,16 +534,6 @@ Expected<StringRef> clang(ArrayRef<StringRef> InputFiles, const ArgList &Args, Triple.isAMDGPU() ? CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch)) : CmdArgs.push_back(Args.MakeArgString("-march=" + Arch)); - // AMDGPU defaults to the LTO pipeline. Non-RDC HIP uses the conventional - // non-LTO pipeline so device codegen still runs here, in parallel, instead - // of being deferred to the LTO link. - // FIXME: This is a stop-gap for non-RDC. Longer term, RDC and non-RDC should - // share a unified interface so runtime libraries can be provided to non-RDC - // compilations without relying on -mlink-builtin-bitcode. - bool NonLTOAMDGPU = Triple.isAMDGPU() && Args.hasArg(OPT_no_lto); - if (Triple.isAMDGPU() && !NonLTOAMDGPU) - CmdArgs.push_back("-flto"); - // Forward all of the `--offload-opt` and `-mllvm` options to the device. for (auto &Arg : Args.filtered(OPT_offload_opt_eq_minus, OPT_mllvm)) CmdArgs.append( @@ -557,7 +547,9 @@ Expected<StringRef> clang(ArrayRef<StringRef> InputFiles, const ArgList &Args, // Force the IR input language so Clang runs the compile and backend phases // instead of treating them as linker inputs, which would defer codegen to // the LTO link and defeat the non-LTO pipeline. - if (NonLTOAMDGPU) + // FIXME: This is a stop-gap for non-RDC. Longer term, RDC and non-RDC should + // share a unified interface. + if (Args.hasArg(OPT_no_lto)) CmdArgs.append({"-x", "ir"}); for (StringRef InputFile : InputFiles) CmdArgs.push_back(InputFile); @@ -621,6 +613,9 @@ Expected<StringRef> clang(ArrayRef<StringRef> InputFiles, const ArgList &Args, for (StringRef Arg : Args.getAllArgValues(OPT_compiler_arg_EQ)) CmdArgs.push_back(Args.MakeArgString(Arg)); + if (Args.hasArg(OPT_no_lto)) + CmdArgs.append({"-flto=none", "-Wno-unused-command-line-argument"}); + if (Error Err = executeCommands(*ClangPath, CmdArgs)) return std::move(Err); _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
