diff options
Diffstat (limited to 'clang/lib/Driver/ToolChains/Arch/ARM.cpp')
| -rw-r--r-- | clang/lib/Driver/ToolChains/Arch/ARM.cpp | 38 |
1 files changed, 5 insertions, 33 deletions
diff --git a/clang/lib/Driver/ToolChains/Arch/ARM.cpp b/clang/lib/Driver/ToolChains/Arch/ARM.cpp index cca47722c20..68a57310ad4 100644 --- a/clang/lib/Driver/ToolChains/Arch/ARM.cpp +++ b/clang/lib/Driver/ToolChains/Arch/ARM.cpp @@ -592,39 +592,11 @@ fp16_fml_fallthrough: Features.push_back("+strict-align"); } - // Do not allow r9 reservation with -frwpi. - if (Args.hasArg(options::OPT_ffixed_r9) && Args.hasArg(options::OPT_frwpi)) { - Arg *A = Args.getLastArg(options::OPT_ffixed_r9); - Arg *B = Args.getLastArg(options::OPT_frwpi); - D.Diag(diag::err_opt_not_valid_with_opt) - << A->getAsString(Args) << B->getAsString(Args); - } - - // The compiler can still use a FP in certain circumstances, - // even when frame pointer elimination is enabled. Thus we should - // not allow to reserve a target's FP register. - const llvm::opt::OptSpecifier RestrictFPOpt = - (Triple.isOSDarwin() || (!Triple.isOSWindows() && Triple.isThumb())) - ? options::OPT_ffixed_r7 - : options::OPT_ffixed_r11; - if (Args.hasArg(RestrictFPOpt)) { - const std::string OptStr = - Args.getLastArg(RestrictFPOpt)->getAsString(Args); - const unsigned int SubStrIndex = strlen("ffixed-r"); - D.Diag(diag::err_reserved_frame_pointer) - << OptStr << OptStr.substr(SubStrIndex); - } - -// Reservation of general purpose registers. -#define HANDLE_FFIXED_R(n) \ - if (Args.hasArg(options::OPT_ffixed_r##n)) \ - Features.push_back("+reserve-r" #n) - HANDLE_FFIXED_R(6); - HANDLE_FFIXED_R(7); - HANDLE_FFIXED_R(8); - HANDLE_FFIXED_R(9); - HANDLE_FFIXED_R(10); - HANDLE_FFIXED_R(11); + // llvm does not support reserving registers in general. There is support + // for reserving r9 on ARM though (defined as a platform-specific register + // in ARM EABI). + if (Args.hasArg(options::OPT_ffixed_r9)) + Features.push_back("+reserve-r9"); // The kext linker doesn't know how to deal with movw/movt. if (KernelOrKext || Args.hasArg(options::OPT_mno_movt)) |
