[Driver] Render target options (e.g. -fuse-init-array) for -fembed-bitcode
Modern ELF platforms use -fuse-init-array to emit .init_array instead of
.ctors . ld.bfd and gold --ctors-in-init-array merge .init_array and
.ctors into .init_array but lld doesn't do that.
If crtbegin*.o crtend*.o don't provide .ctors/.dtors, such .ctors in
user object files can lead to crash (see PR42002. The first and the last
elements in .ctors/.dtors are ignored - they are traditionally provided
by crtbegin*.o crtend*.o).
Call addClangTargetOptions() to ensure -fuse-init-array is rendered on
modern ELF platforms. On Hexagon, this renders -target-feature
+reserved-r19 for -ffixed-r19.
Reviewed By: compnerd
Differential Revision: https://reviews.llvm.org/D62509
llvm-svn: 362052
diff --git a/clang/test/Driver/fembed-bitcode.c b/clang/test/Driver/fembed-bitcode.c
index b0ec63f..c1f020b 100644
--- a/clang/test/Driver/fembed-bitcode.c
+++ b/clang/test/Driver/fembed-bitcode.c
@@ -26,3 +26,11 @@
// CHECK-AARCH64: "darwinpcs"
// CHECK-AARCH64-NOT: "-fdebug-compilation-dir"
+// RUN: %clang -target x86_64-pc-freebsd12 -fembed-bitcode=all -c %s -### 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-INITARRAY %s
+// CHECK-INITARRAY: "-fuse-init-array"
+
+// RUN: %clang -target hexagon-unknown-elf -ffixed-r19 -fembed-bitcode=all -c %s -### 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-HEXAGON %s
+// CHECK-HEXAGON: "-target-feature"
+// CHECK-HEXAGON: "+reserved-r19"