[ARM][CMSE] Add commandline option and feature macro
Defines macro ARM_FEATURE_CMSE to 1 for v8-M targets and introduces
-mcmse option which for v8-M targets sets ARM_FEATURE_CMSE to 3.
A diagnostic is produced when the option is given on architectures
without support for Security Extensions.
Reviewed By: dmgreen, snidertm
Differential Revision: https://reviews.llvm.org/D59879
llvm-svn: 361261
diff --git a/clang/lib/Basic/Targets/ARM.cpp b/clang/lib/Basic/Targets/ARM.cpp
index b74514e..55c0d37 100644
--- a/clang/lib/Basic/Targets/ARM.cpp
+++ b/clang/lib/Basic/Targets/ARM.cpp
@@ -434,6 +434,11 @@
DSP = 1;
} else if (Feature == "+fp-only-sp") {
HW_FP_remove |= HW_FP_DP;
+ } else if (Feature == "+8msecext") {
+ if (CPUProfile != "M" || ArchVersion != 8) {
+ Diags.Report(diag::err_target_unsupported_mcmse) << CPU;
+ return false;
+ }
} else if (Feature == "+strict-align") {
Unaligned = 0;
} else if (Feature == "+fp16") {
@@ -713,6 +718,10 @@
Builder.defineMacro("__ARM_SIZEOF_MINIMAL_ENUM", Opts.ShortEnums ? "1" : "4");
+ // CMSE
+ if (ArchVersion == 8 && ArchProfile == llvm::ARM::ProfileKind::M)
+ Builder.defineMacro("__ARM_FEATURE_CMSE", Opts.Cmse ? "3" : "1");
+
if (ArchVersion >= 6 && CPUAttr != "6M" && CPUAttr != "8M_BASE") {
Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");