[llvm] 9222607 - gn build: Add check-builtins target.

via llvm-commits llvm-commits at lists.llvm.org
Mon Apr 7 13:22:55 PDT 2025


Author: Peter Collingbourne
Date: 2025-04-07T13:22:52-07:00
New Revision: 922260722795471870ef793f3187e9a37b145661

URL: https://github.com/llvm/llvm-project/commit/922260722795471870ef793f3187e9a37b145661
DIFF: https://github.com/llvm/llvm-project/commit/922260722795471870ef793f3187e9a37b145661.diff

LOG: gn build: Add check-builtins target.

Tested on aarch64 Linux and x86_64 Linux.

Reviewers: aeubanks, nico

Reviewed By: aeubanks

Pull Request: https://github.com/llvm/llvm-project/pull/134482

Added: 
    llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni
    llvm/utils/gn/secondary/compiler-rt/test/builtins/BUILD.gn

Modified: 
    llvm/utils/gn/build/sync_source_lists_from_cmake.py
    llvm/utils/gn/secondary/BUILD.gn
    llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn

Removed: 
    


################################################################################
diff  --git a/llvm/utils/gn/build/sync_source_lists_from_cmake.py b/llvm/utils/gn/build/sync_source_lists_from_cmake.py
index a8d922acbd1dd..4cd30aa410864 100755
--- a/llvm/utils/gn/build/sync_source_lists_from_cmake.py
+++ b/llvm/utils/gn/build/sync_source_lists_from_cmake.py
@@ -108,6 +108,12 @@ def get_sources(source_re, text):
 
         gn_cpp = get_sources(gn_cpp_re, open(gn_file).read())
         gn_cpp |= get_sources(gn_cpp_re2, open(gn_file).read())
+
+        sources_file = os.path.join(os.path.dirname(gn_file), "sources.gni")
+        if os.path.exists(sources_file):
+            gn_cpp |= get_sources(gn_cpp_re, open(sources_file).read())
+            gn_cpp |= get_sources(gn_cpp_re2, open(sources_file).read())
+
         cmake_cpp = get_sources(cmake_cpp_re, open(cmake_file).read())
 
         if gn_cpp == cmake_cpp:

diff  --git a/llvm/utils/gn/secondary/BUILD.gn b/llvm/utils/gn/secondary/BUILD.gn
index 83093f33fcaf2..a0d9cd641f8d0 100644
--- a/llvm/utils/gn/secondary/BUILD.gn
+++ b/llvm/utils/gn/secondary/BUILD.gn
@@ -10,6 +10,7 @@ group("default") {
     "//compiler-rt",
     "//compiler-rt/include",
     "//compiler-rt/lib/scudo",
+    "//compiler-rt/test/builtins",
     "//lld/test",
     "//lldb/test",
     "//llvm/test",

diff  --git a/llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn
index d1048259bcd44..44f5fdc20837c 100644
--- a/llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn
@@ -1,18 +1,9 @@
+import("//compiler-rt/lib/builtins/sources.gni")
 import("//compiler-rt/target.gni")
 import("//llvm/utils/gn/build/buildflags.gni")
 
-declare_args() {
-  # Skip the atomic builtin (should normally be provided by a shared library).
-  compiler_rt_exclude_atomic_builtin = true
-}
-
 lse_targets = []
 
-if (current_cpu == "x86" || current_cpu == "x64") {
-  # long double is not 80 bits on Android or MSVC.
-  long_double_is_80_bits = current_os != "android" && current_os != "win"
-}
-
 if (current_cpu == "arm64") {
   foreach(pat,
           [
@@ -89,516 +80,8 @@ static_library("builtins") {
     cflags_c = [ "-std=c11" ]
   }
 
-  sources = [
-    "absvdi2.c",
-    "absvsi2.c",
-    "absvti2.c",
-    "adddf3.c",
-    "addsf3.c",
-    "addvdi3.c",
-    "addvsi3.c",
-    "addvti3.c",
-    "apple_versioning.c",
-    "ashldi3.c",
-    "ashlti3.c",
-    "ashrdi3.c",
-    "ashrti3.c",
-    "bswapdi2.c",
-    "bswapsi2.c",
-    "clzdi2.c",
-    "clzsi2.c",
-    "clzti2.c",
-    "cmpdi2.c",
-    "cmpti2.c",
-    "comparedf2.c",
-    "comparesf2.c",
-    "ctzdi2.c",
-    "ctzsi2.c",
-    "ctzti2.c",
-    "divdc3.c",
-    "divdf3.c",
-    "divdi3.c",
-    "divmoddi4.c",
-    "divmodsi4.c",
-    "divmodti4.c",
-    "divsc3.c",
-    "divsf3.c",
-    "divsi3.c",
-    "divti3.c",
-    "extendhfsf2.c",
-    "extendsfdf2.c",
-    "ffsdi2.c",
-    "ffssi2.c",
-    "ffsti2.c",
-    "fixdfdi.c",
-    "fixdfsi.c",
-    "fixdfti.c",
-    "fixsfdi.c",
-    "fixsfsi.c",
-    "fixsfti.c",
-    "fixunsdfdi.c",
-    "fixunsdfsi.c",
-    "fixunsdfti.c",
-    "fixunssfdi.c",
-    "fixunssfsi.c",
-    "fixunssfti.c",
-    "floatdidf.c",
-    "floatdisf.c",
-    "floatsidf.c",
-    "floatsisf.c",
-    "floattidf.c",
-    "floattisf.c",
-    "floatundidf.c",
-    "floatundisf.c",
-    "floatunsidf.c",
-    "floatunsisf.c",
-    "floatuntidf.c",
-    "floatuntisf.c",
-    "fp_mode.c",
-    "int_util.c",
-    "lshrdi3.c",
-    "lshrti3.c",
-    "moddi3.c",
-    "modsi3.c",
-    "modti3.c",
-    "muldc3.c",
-    "muldf3.c",
-    "muldi3.c",
-    "mulodi4.c",
-    "mulosi4.c",
-    "muloti4.c",
-    "mulsc3.c",
-    "mulsf3.c",
-    "multi3.c",
-    "mulvdi3.c",
-    "mulvsi3.c",
-    "mulvti3.c",
-    "negdf2.c",
-    "negdi2.c",
-    "negsf2.c",
-    "negti2.c",
-    "negvdi2.c",
-    "negvsi2.c",
-    "negvti2.c",
-    "os_version_check.c",
-    "paritydi2.c",
-    "paritysi2.c",
-    "parityti2.c",
-    "popcountdi2.c",
-    "popcountsi2.c",
-    "popcountti2.c",
-    "powidf2.c",
-    "powisf2.c",
-    "subdf3.c",
-    "subsf3.c",
-    "subvdi3.c",
-    "subvsi3.c",
-    "subvti3.c",
-    "trampoline_setup.c",
-    "truncdfhf2.c",
-    "truncdfsf2.c",
-    "truncsfhf2.c",
-    "ucmpdi2.c",
-    "ucmpti2.c",
-    "udivdi3.c",
-    "udivmoddi4.c",
-    "udivmodsi4.c",
-    "udivmodti4.c",
-    "udivsi3.c",
-    "udivti3.c",
-    "umoddi3.c",
-    "umodsi3.c",
-    "umodti3.c",
-
-    # This depends on unwind.h which is present in Clang headers. We should
-    # reconsider this if we ever decide to support building builtins with
-    # other compilers.
-    "gcc_personality_v0.c",
-  ]
-
-  if (current_os != "fuchsia") {
-    sources += [ "clear_cache.c" ]
-  }
-
-  if (current_os != "fuchsia" && current_os != "baremetal") {
-    sources += [
-      "emutls.c",
-      "enable_execute_stack.c",
-      "eprintf.c",
-    ]
-  }
-
-  if (current_os == "mac" || current_os == "ios") {
-    sources += [
-      "atomic_flag_clear.c",
-      "atomic_flag_clear_explicit.c",
-      "atomic_flag_test_and_set.c",
-      "atomic_flag_test_and_set_explicit.c",
-      "atomic_signal_fence.c",
-      "atomic_thread_fence.c",
-    ]
-  }
-
-  if ((current_cpu == "x64" && current_os != "win") || current_cpu == "arm64") {
-    # GENERIC_TF_SOURCES
-    sources += [
-      "addtf3.c",
-      "comparetf2.c",
-      "divtc3.c",
-      "divtf3.c",
-      "extenddftf2.c",
-      "extendhftf2.c",
-      "extendsftf2.c",
-      "fixtfdi.c",
-      "fixtfsi.c",
-      "fixtfti.c",
-      "fixunstfdi.c",
-      "fixunstfsi.c",
-      "fixunstfti.c",
-      "floatditf.c",
-      "floatsitf.c",
-      "floattitf.c",
-      "floatunditf.c",
-      "floatunsitf.c",
-      "floatuntitf.c",
-      "multc3.c",
-      "multf3.c",
-      "powitf2.c",
-      "subtf3.c",
-      "trunctfdf2.c",
-      "trunctfhf2.c",
-      "trunctfsf2.c",
-    ]
-  }
-
-  if (current_cpu == "x86" || current_cpu == "x64") {
-    sources -= [ "fp_mode.c" ]
-    sources += [
-      "cpu_model/x86.c",
-      "extendbfsf2.c",
-      "i386/fp_mode.c",
-      "truncdfbf2.c",
-      "truncsfbf2.c",
-      "trunctfbf2.c",
-      "truncxfbf2.c",
-    ]
-    if (long_double_is_80_bits) {
-      sources += [
-        "divxc3.c",
-        "extendhfxf2.c",
-        "extendxftf2.c",
-        "fixunsxfdi.c",
-        "fixunsxfsi.c",
-        "fixunsxfti.c",
-        "fixxfdi.c",
-        "fixxfti.c",
-        "floatdixf.c",
-        "floattixf.c",
-        "floatundixf.c",
-        "floatuntixf.c",
-        "mulxc3.c",
-        "powixf2.c",
-        "trunctfxf2.c",
-        "truncxfhf2.c",
-      ]
-    }
-  }
-  if (current_cpu == "x86") {
-    sources -= [
-      "ashldi3.c",
-      "ashrdi3.c",
-      "divdi3.c",
-      "floatdidf.c",
-      "floatdisf.c",
-      "floatundidf.c",
-      "floatundisf.c",
-      "lshrdi3.c",
-      "moddi3.c",
-      "muldi3.c",
-      "udivdi3.c",
-      "umoddi3.c",
-    ]
-    sources += [
-      "i386/ashldi3.S",
-      "i386/ashrdi3.S",
-      "i386/divdi3.S",
-      "i386/floatdidf.S",
-      "i386/floatdisf.S",
-      "i386/floatundidf.S",
-      "i386/floatundisf.S",
-      "i386/lshrdi3.S",
-      "i386/moddi3.S",
-      "i386/muldi3.S",
-      "i386/udivdi3.S",
-      "i386/umoddi3.S",
-    ]
-    if (long_double_is_80_bits) {
-      sources -= [
-        "floatdixf.c",
-        "floatundixf.c",
-      ]
-      sources += [
-        "i386/floatdixf.S",
-        "i386/floatundixf.S",
-      ]
-    }
-    if (current_os == "win") {
-      sources += [ "i386/chkstk.S" ]
-    }
-  } else if (current_cpu == "x64") {
-    sources -= [
-      "floatdidf.c",
-      "floatdisf.c",
-      "floatundidf.c",
-      "floatundisf.c",
-    ]
-    sources += [
-      "x86_64/floatdidf.c",
-      "x86_64/floatdisf.c",
-      "x86_64/floatundidf.S",
-      "x86_64/floatundisf.S",
-    ]
-    if (long_double_is_80_bits) {
-      sources -= [
-        "floatdixf.c",
-        "floatundixf.c",
-      ]
-      sources += [
-        "x86_64/floatdixf.c",
-        "x86_64/floatundixf.S",
-      ]
-    }
-    if (current_os == "win") {
-      sources += [ "x86_64/chkstk.S" ]
-    }
-  }
-
-  if (current_cpu == "arm") {
-    if (current_os != "mingw") {
-      sources -= [
-        "bswapdi2.c",
-        "bswapsi2.c",
-        "clzdi2.c",
-        "clzsi2.c",
-        "comparesf2.c",
-        "divmodsi4.c",
-        "divsi3.c",
-        "fp_mode.c",
-        "modsi3.c",
-        "udivmodsi4.c",
-        "udivsi3.c",
-        "umodsi3.c",
-      ]
-      sources += [
-        "arm/aeabi_cdcmp.S",
-        "arm/aeabi_cdcmpeq_check_nan.c",
-        "arm/aeabi_cfcmp.S",
-        "arm/aeabi_cfcmpeq_check_nan.c",
-        "arm/aeabi_dcmp.S",
-        "arm/aeabi_div0.c",
-        "arm/aeabi_drsub.c",
-        "arm/aeabi_fcmp.S",
-        "arm/aeabi_frsub.c",
-        "arm/aeabi_idivmod.S",
-        "arm/aeabi_ldivmod.S",
-        "arm/aeabi_memcmp.S",
-        "arm/aeabi_memcpy.S",
-        "arm/aeabi_memmove.S",
-        "arm/aeabi_memset.S",
-        "arm/aeabi_uidivmod.S",
-        "arm/aeabi_uldivmod.S",
-        "arm/bswapdi2.S",
-        "arm/bswapsi2.S",
-        "arm/clzdi2.S",
-        "arm/clzsi2.S",
-        "arm/comparesf2.S",
-        "arm/divmodsi4.S",
-        "arm/divsi3.S",
-        "arm/fp_mode.c",
-        "arm/modsi3.S",
-        "arm/switch16.S",
-        "arm/switch32.S",
-        "arm/switch8.S",
-        "arm/switchu8.S",
-        "arm/sync_fetch_and_add_4.S",
-        "arm/sync_fetch_and_add_8.S",
-        "arm/sync_fetch_and_and_4.S",
-        "arm/sync_fetch_and_and_8.S",
-        "arm/sync_fetch_and_max_4.S",
-        "arm/sync_fetch_and_max_8.S",
-        "arm/sync_fetch_and_min_4.S",
-        "arm/sync_fetch_and_min_8.S",
-        "arm/sync_fetch_and_nand_4.S",
-        "arm/sync_fetch_and_nand_8.S",
-        "arm/sync_fetch_and_or_4.S",
-        "arm/sync_fetch_and_or_8.S",
-        "arm/sync_fetch_and_sub_4.S",
-        "arm/sync_fetch_and_sub_8.S",
-        "arm/sync_fetch_and_umax_4.S",
-        "arm/sync_fetch_and_umax_8.S",
-        "arm/sync_fetch_and_umin_4.S",
-        "arm/sync_fetch_and_umin_8.S",
-        "arm/sync_fetch_and_xor_4.S",
-        "arm/sync_fetch_and_xor_8.S",
-        "arm/sync_synchronize.S",
-        "arm/udivmodsi4.S",
-        "arm/udivsi3.S",
-        "arm/umodsi3.S",
-      ]
-
-      if (current_os == "android") {
-        sources += [
-          "arm/adddf3vfp.S",
-          "arm/addsf3vfp.S",
-          "arm/divdf3vfp.S",
-          "arm/divsf3vfp.S",
-          "arm/eqdf2vfp.S",
-          "arm/eqsf2vfp.S",
-          "arm/extendsfdf2vfp.S",
-          "arm/fixdfsivfp.S",
-          "arm/fixsfsivfp.S",
-          "arm/fixunsdfsivfp.S",
-          "arm/fixunssfsivfp.S",
-          "arm/floatsidfvfp.S",
-          "arm/floatsisfvfp.S",
-          "arm/floatunssidfvfp.S",
-          "arm/floatunssisfvfp.S",
-          "arm/gedf2vfp.S",
-          "arm/gesf2vfp.S",
-          "arm/gtdf2vfp.S",
-          "arm/gtsf2vfp.S",
-          "arm/ledf2vfp.S",
-          "arm/lesf2vfp.S",
-          "arm/ltdf2vfp.S",
-          "arm/ltsf2vfp.S",
-          "arm/muldf3vfp.S",
-          "arm/mulsf3vfp.S",
-          "arm/nedf2vfp.S",
-          "arm/negdf2vfp.S",
-          "arm/negsf2vfp.S",
-          "arm/nesf2vfp.S",
-          "arm/restore_vfp_d8_d15_regs.S",
-          "arm/save_vfp_d8_d15_regs.S",
-          "arm/subdf3vfp.S",
-          "arm/subsf3vfp.S",
-          "arm/truncdfsf2vfp.S",
-          "arm/unorddf2vfp.S",
-          "arm/unordsf2vfp.S",
-        ]
-      }
-    } else {
-      sources += [
-        "arm/aeabi_idivmod.S",
-        "arm/aeabi_ldivmod.S",
-        "arm/aeabi_uidivmod.S",
-        "arm/aeabi_uldivmod.S",
-        "arm/chkstk.S",
-      ]
-    }
-  }
-
-  if (current_cpu == "arm64") {
-    sources -= [ "fp_mode.c" ]
-    sources += [
-      "aarch64/fp_mode.c",
-      "cpu_model/aarch64.c",
-    ]
-    if (current_os == "mingw") {
-      sources += [ "aarch64/chkstk.S" ]
-    }
-  }
-
-  if (current_cpu == "avr") {
-    sources += [
-      "avr/divmodhi4.S",
-      "avr/divmodqi4.S",
-      "avr/exit.S",
-      "avr/mulhi3.S",
-      "avr/mulqi3.S",
-      "avr/udivmodhi4.S",
-      "avr/udivmodqi4.S",
-    ]
-  }
-
-  if (current_cpu == "hexagon") {
-    sources += [
-      "hexagon/common_entry_exit_abi1.S",
-      "hexagon/common_entry_exit_abi2.S",
-      "hexagon/common_entry_exit_legacy.S",
-      "hexagon/dfaddsub.S",
-      "hexagon/dfdiv.S",
-      "hexagon/dffma.S",
-      "hexagon/dfminmax.S",
-      "hexagon/dfmul.S",
-      "hexagon/dfsqrt.S",
-      "hexagon/divdi3.S",
-      "hexagon/divsi3.S",
-      "hexagon/fastmath2_dlib_asm.S",
-      "hexagon/fastmath2_ldlib_asm.S",
-      "hexagon/fastmath_dlib_asm.S",
-      "hexagon/memcpy_forward_vp4cp4n2.S",
-      "hexagon/memcpy_likely_aligned.S",
-      "hexagon/moddi3.S",
-      "hexagon/modsi3.S",
-      "hexagon/sfdiv_opt.S",
-      "hexagon/sfsqrt_opt.S",
-      "hexagon/udivdi3.S",
-      "hexagon/udivmoddi4.S",
-      "hexagon/udivmodsi4.S",
-      "hexagon/udivsi3.S",
-      "hexagon/umoddi3.S",
-      "hexagon/umodsi3.S",
-    ]
-  }
-  if (current_cpu == "loongarch" || current_cpu == "loongarch64") {
-    sources -= [ "fp_mode.c" ]
-    sources += [ "loongarch/fp_mode.c" ]
-  }
-
-  if (current_cpu == "ppc64") {
-    sources += [
-      "ppc/divtc3.c",
-      "ppc/fixtfdi.c",
-      "ppc/fixtfti.c",
-      "ppc/fixunstfdi.c",
-      "ppc/fixunstfti.c",
-      "ppc/floatditf.c",
-      "ppc/floattitf.c",
-      "ppc/floatunditf.c",
-      "ppc/gcc_qadd.c",
-      "ppc/gcc_qdiv.c",
-      "ppc/gcc_qmul.c",
-      "ppc/gcc_qsub.c",
-      "ppc/multc3.c",
-    ]
-  }
-
-  if (current_cpu == "riscv" || current_cpu == "riscv64") {
-    sources += [
-      "cpu_model/riscv.c",
-      "riscv/fp_mode.c",
-      "riscv/restore.S",
-      "riscv/save.S",
-    ]
-  }
-  if (current_cpu == "riscv") {
-    sources += [ "riscv/mulsi3.S" ]
-  }
-
-  if (current_cpu == "riscv64") {
-    sources += [ "riscv/muldi3.S" ]
-  }
-
-  if (current_cpu == "ve") {
-    sources += [
-      "ve/grow_stack.S",
-      "ve/grow_stack_align.S",
-    ]
-  }
-
-  if (!compiler_rt_exclude_atomic_builtin) {
-    sources += [ "atomic.c" ]
-  }
+  defines = builtins_defines
+  sources = builtins_sources
 
   deps = lse_targets
 }

diff  --git a/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni b/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni
new file mode 100644
index 0000000000000..9e8e52c977a17
--- /dev/null
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni
@@ -0,0 +1,529 @@
+declare_args() {
+  # Skip the atomic builtin (should normally be provided by a shared library).
+  compiler_rt_exclude_atomic_builtin = true
+}
+
+if (current_cpu == "x86" || current_cpu == "x64") {
+  # long double is not 80 bits on Android or MSVC.
+  long_double_is_80_bits = current_os != "android" && current_os != "win"
+}
+
+builtins_defines = []
+
+# This is based on who sets HasFloat16 to true in clang/lib/Basic/Targets.
+if (current_cpu == "aarch64" || current_cpu == "arm" ||
+    current_cpu == "hexagon" || current_cpu == "riscv" ||
+    current_cpu == "riscv64" || current_cpu == "x64") {
+  builtins_defines += [ "COMPILER_RT_HAS_FLOAT16" ]
+}
+
+builtins_sources = [
+  "absvdi2.c",
+  "absvsi2.c",
+  "absvti2.c",
+  "adddf3.c",
+  "addsf3.c",
+  "addvdi3.c",
+  "addvsi3.c",
+  "addvti3.c",
+  "apple_versioning.c",
+  "ashldi3.c",
+  "ashlti3.c",
+  "ashrdi3.c",
+  "ashrti3.c",
+  "bswapdi2.c",
+  "bswapsi2.c",
+  "clzdi2.c",
+  "clzsi2.c",
+  "clzti2.c",
+  "cmpdi2.c",
+  "cmpti2.c",
+  "comparedf2.c",
+  "comparesf2.c",
+  "ctzdi2.c",
+  "ctzsi2.c",
+  "ctzti2.c",
+  "divdc3.c",
+  "divdf3.c",
+  "divdi3.c",
+  "divmoddi4.c",
+  "divmodsi4.c",
+  "divmodti4.c",
+  "divsc3.c",
+  "divsf3.c",
+  "divsi3.c",
+  "divti3.c",
+  "extendhfsf2.c",
+  "extendsfdf2.c",
+  "ffsdi2.c",
+  "ffssi2.c",
+  "ffsti2.c",
+  "fixdfdi.c",
+  "fixdfsi.c",
+  "fixdfti.c",
+  "fixsfdi.c",
+  "fixsfsi.c",
+  "fixsfti.c",
+  "fixunsdfdi.c",
+  "fixunsdfsi.c",
+  "fixunsdfti.c",
+  "fixunssfdi.c",
+  "fixunssfsi.c",
+  "fixunssfti.c",
+  "floatdidf.c",
+  "floatdisf.c",
+  "floatsidf.c",
+  "floatsisf.c",
+  "floattidf.c",
+  "floattisf.c",
+  "floatundidf.c",
+  "floatundisf.c",
+  "floatunsidf.c",
+  "floatunsisf.c",
+  "floatuntidf.c",
+  "floatuntisf.c",
+  "fp_mode.c",
+  "int_util.c",
+  "lshrdi3.c",
+  "lshrti3.c",
+  "moddi3.c",
+  "modsi3.c",
+  "modti3.c",
+  "muldc3.c",
+  "muldf3.c",
+  "muldi3.c",
+  "mulodi4.c",
+  "mulosi4.c",
+  "muloti4.c",
+  "mulsc3.c",
+  "mulsf3.c",
+  "multi3.c",
+  "mulvdi3.c",
+  "mulvsi3.c",
+  "mulvti3.c",
+  "negdf2.c",
+  "negdi2.c",
+  "negsf2.c",
+  "negti2.c",
+  "negvdi2.c",
+  "negvsi2.c",
+  "negvti2.c",
+  "os_version_check.c",
+  "paritydi2.c",
+  "paritysi2.c",
+  "parityti2.c",
+  "popcountdi2.c",
+  "popcountsi2.c",
+  "popcountti2.c",
+  "powidf2.c",
+  "powisf2.c",
+  "subdf3.c",
+  "subsf3.c",
+  "subvdi3.c",
+  "subvsi3.c",
+  "subvti3.c",
+  "trampoline_setup.c",
+  "truncdfhf2.c",
+  "truncdfsf2.c",
+  "truncsfhf2.c",
+  "ucmpdi2.c",
+  "ucmpti2.c",
+  "udivdi3.c",
+  "udivmoddi4.c",
+  "udivmodsi4.c",
+  "udivmodti4.c",
+  "udivsi3.c",
+  "udivti3.c",
+  "umoddi3.c",
+  "umodsi3.c",
+  "umodti3.c",
+
+  # This depends on unwind.h which is present in Clang headers. We should
+  # reconsider this if we ever decide to support building builtins with
+  # other compilers.
+  "gcc_personality_v0.c",
+]
+
+if (current_os != "fuchsia") {
+  builtins_sources += [ "clear_cache.c" ]
+}
+
+if (current_os != "fuchsia" && current_os != "baremetal") {
+  builtins_sources += [
+    "emutls.c",
+    "enable_execute_stack.c",
+    "eprintf.c",
+  ]
+}
+
+if (current_os == "mac" || current_os == "ios") {
+  builtins_sources += [
+    "atomic_flag_clear.c",
+    "atomic_flag_clear_explicit.c",
+    "atomic_flag_test_and_set.c",
+    "atomic_flag_test_and_set_explicit.c",
+    "atomic_signal_fence.c",
+    "atomic_thread_fence.c",
+  ]
+}
+
+if ((current_cpu == "x64" && current_os != "win") || current_cpu == "arm64") {
+  # GENERIC_TF_SOURCES
+  builtins_sources += [
+    "addtf3.c",
+    "comparetf2.c",
+    "divtc3.c",
+    "divtf3.c",
+    "extenddftf2.c",
+    "extendhftf2.c",
+    "extendsftf2.c",
+    "fixtfdi.c",
+    "fixtfsi.c",
+    "fixtfti.c",
+    "fixunstfdi.c",
+    "fixunstfsi.c",
+    "fixunstfti.c",
+    "floatditf.c",
+    "floatsitf.c",
+    "floattitf.c",
+    "floatunditf.c",
+    "floatunsitf.c",
+    "floatuntitf.c",
+    "multc3.c",
+    "multf3.c",
+    "powitf2.c",
+    "subtf3.c",
+    "trunctfdf2.c",
+    "trunctfhf2.c",
+    "trunctfsf2.c",
+  ]
+}
+
+if (current_cpu == "x86" || current_cpu == "x64") {
+  builtins_sources -= [ "fp_mode.c" ]
+  builtins_sources += [
+    "cpu_model/x86.c",
+    "extendbfsf2.c",
+    "i386/fp_mode.c",
+    "truncdfbf2.c",
+    "truncsfbf2.c",
+    "trunctfbf2.c",
+    "truncxfbf2.c",
+  ]
+  if (long_double_is_80_bits) {
+    builtins_sources += [
+      "divxc3.c",
+      "extendhfxf2.c",
+      "extendxftf2.c",
+      "fixunsxfdi.c",
+      "fixunsxfsi.c",
+      "fixunsxfti.c",
+      "fixxfdi.c",
+      "fixxfti.c",
+      "floatdixf.c",
+      "floattixf.c",
+      "floatundixf.c",
+      "floatuntixf.c",
+      "mulxc3.c",
+      "powixf2.c",
+      "trunctfxf2.c",
+      "truncxfhf2.c",
+    ]
+  }
+}
+if (current_cpu == "x86") {
+  builtins_sources -= [
+    "ashldi3.c",
+    "ashrdi3.c",
+    "divdi3.c",
+    "floatdidf.c",
+    "floatdisf.c",
+    "floatundidf.c",
+    "floatundisf.c",
+    "lshrdi3.c",
+    "moddi3.c",
+    "muldi3.c",
+    "udivdi3.c",
+    "umoddi3.c",
+  ]
+  builtins_sources += [
+    "i386/ashldi3.S",
+    "i386/ashrdi3.S",
+    "i386/divdi3.S",
+    "i386/floatdidf.S",
+    "i386/floatdisf.S",
+    "i386/floatundidf.S",
+    "i386/floatundisf.S",
+    "i386/lshrdi3.S",
+    "i386/moddi3.S",
+    "i386/muldi3.S",
+    "i386/udivdi3.S",
+    "i386/umoddi3.S",
+  ]
+  if (long_double_is_80_bits) {
+    builtins_sources -= [
+      "floatdixf.c",
+      "floatundixf.c",
+    ]
+    builtins_sources += [
+      "i386/floatdixf.S",
+      "i386/floatundixf.S",
+    ]
+  }
+  if (current_os == "win") {
+    builtins_sources += [ "i386/chkstk.S" ]
+  }
+} else if (current_cpu == "x64") {
+  builtins_sources -= [
+    "floatdidf.c",
+    "floatdisf.c",
+    "floatundidf.c",
+    "floatundisf.c",
+  ]
+  builtins_sources += [
+    "x86_64/floatdidf.c",
+    "x86_64/floatdisf.c",
+    "x86_64/floatundidf.S",
+    "x86_64/floatundisf.S",
+  ]
+  if (long_double_is_80_bits) {
+    builtins_sources -= [
+      "floatdixf.c",
+      "floatundixf.c",
+    ]
+    builtins_sources += [
+      "x86_64/floatdixf.c",
+      "x86_64/floatundixf.S",
+    ]
+  }
+  if (current_os == "win") {
+    builtins_sources += [ "x86_64/chkstk.S" ]
+  }
+}
+
+if (current_cpu == "arm") {
+  if (current_os != "mingw") {
+    builtins_sources -= [
+      "bswapdi2.c",
+      "bswapsi2.c",
+      "clzdi2.c",
+      "clzsi2.c",
+      "comparesf2.c",
+      "divmodsi4.c",
+      "divsi3.c",
+      "fp_mode.c",
+      "modsi3.c",
+      "udivmodsi4.c",
+      "udivsi3.c",
+      "umodsi3.c",
+    ]
+    builtins_sources += [
+      "arm/aeabi_cdcmp.S",
+      "arm/aeabi_cdcmpeq_check_nan.c",
+      "arm/aeabi_cfcmp.S",
+      "arm/aeabi_cfcmpeq_check_nan.c",
+      "arm/aeabi_dcmp.S",
+      "arm/aeabi_div0.c",
+      "arm/aeabi_drsub.c",
+      "arm/aeabi_fcmp.S",
+      "arm/aeabi_frsub.c",
+      "arm/aeabi_idivmod.S",
+      "arm/aeabi_ldivmod.S",
+      "arm/aeabi_memcmp.S",
+      "arm/aeabi_memcpy.S",
+      "arm/aeabi_memmove.S",
+      "arm/aeabi_memset.S",
+      "arm/aeabi_uidivmod.S",
+      "arm/aeabi_uldivmod.S",
+      "arm/bswapdi2.S",
+      "arm/bswapsi2.S",
+      "arm/clzdi2.S",
+      "arm/clzsi2.S",
+      "arm/comparesf2.S",
+      "arm/divmodsi4.S",
+      "arm/divsi3.S",
+      "arm/fp_mode.c",
+      "arm/modsi3.S",
+      "arm/switch16.S",
+      "arm/switch32.S",
+      "arm/switch8.S",
+      "arm/switchu8.S",
+      "arm/sync_fetch_and_add_4.S",
+      "arm/sync_fetch_and_add_8.S",
+      "arm/sync_fetch_and_and_4.S",
+      "arm/sync_fetch_and_and_8.S",
+      "arm/sync_fetch_and_max_4.S",
+      "arm/sync_fetch_and_max_8.S",
+      "arm/sync_fetch_and_min_4.S",
+      "arm/sync_fetch_and_min_8.S",
+      "arm/sync_fetch_and_nand_4.S",
+      "arm/sync_fetch_and_nand_8.S",
+      "arm/sync_fetch_and_or_4.S",
+      "arm/sync_fetch_and_or_8.S",
+      "arm/sync_fetch_and_sub_4.S",
+      "arm/sync_fetch_and_sub_8.S",
+      "arm/sync_fetch_and_umax_4.S",
+      "arm/sync_fetch_and_umax_8.S",
+      "arm/sync_fetch_and_umin_4.S",
+      "arm/sync_fetch_and_umin_8.S",
+      "arm/sync_fetch_and_xor_4.S",
+      "arm/sync_fetch_and_xor_8.S",
+      "arm/sync_synchronize.S",
+      "arm/udivmodsi4.S",
+      "arm/udivsi3.S",
+      "arm/umodsi3.S",
+    ]
+
+    if (current_os == "android") {
+      builtins_sources += [
+        "arm/adddf3vfp.S",
+        "arm/addsf3vfp.S",
+        "arm/divdf3vfp.S",
+        "arm/divsf3vfp.S",
+        "arm/eqdf2vfp.S",
+        "arm/eqsf2vfp.S",
+        "arm/extendsfdf2vfp.S",
+        "arm/fixdfsivfp.S",
+        "arm/fixsfsivfp.S",
+        "arm/fixunsdfsivfp.S",
+        "arm/fixunssfsivfp.S",
+        "arm/floatsidfvfp.S",
+        "arm/floatsisfvfp.S",
+        "arm/floatunssidfvfp.S",
+        "arm/floatunssisfvfp.S",
+        "arm/gedf2vfp.S",
+        "arm/gesf2vfp.S",
+        "arm/gtdf2vfp.S",
+        "arm/gtsf2vfp.S",
+        "arm/ledf2vfp.S",
+        "arm/lesf2vfp.S",
+        "arm/ltdf2vfp.S",
+        "arm/ltsf2vfp.S",
+        "arm/muldf3vfp.S",
+        "arm/mulsf3vfp.S",
+        "arm/nedf2vfp.S",
+        "arm/negdf2vfp.S",
+        "arm/negsf2vfp.S",
+        "arm/nesf2vfp.S",
+        "arm/restore_vfp_d8_d15_regs.S",
+        "arm/save_vfp_d8_d15_regs.S",
+        "arm/subdf3vfp.S",
+        "arm/subsf3vfp.S",
+        "arm/truncdfsf2vfp.S",
+        "arm/unorddf2vfp.S",
+        "arm/unordsf2vfp.S",
+      ]
+    }
+  } else {
+    builtins_sources += [
+      "arm/aeabi_idivmod.S",
+      "arm/aeabi_ldivmod.S",
+      "arm/aeabi_uidivmod.S",
+      "arm/aeabi_uldivmod.S",
+      "arm/chkstk.S",
+    ]
+  }
+}
+
+if (current_cpu == "arm64") {
+  builtins_sources -= [ "fp_mode.c" ]
+  builtins_sources += [
+    "aarch64/fp_mode.c",
+    "cpu_model/aarch64.c",
+  ]
+  if (current_os == "mingw") {
+    builtins_sources += [ "aarch64/chkstk.S" ]
+  }
+}
+
+if (current_cpu == "avr") {
+  builtins_sources += [
+    "avr/divmodhi4.S",
+    "avr/divmodqi4.S",
+    "avr/exit.S",
+    "avr/mulhi3.S",
+    "avr/mulqi3.S",
+    "avr/udivmodhi4.S",
+    "avr/udivmodqi4.S",
+  ]
+}
+
+if (current_cpu == "hexagon") {
+  builtins_sources += [
+    "hexagon/common_entry_exit_abi1.S",
+    "hexagon/common_entry_exit_abi2.S",
+    "hexagon/common_entry_exit_legacy.S",
+    "hexagon/dfaddsub.S",
+    "hexagon/dfdiv.S",
+    "hexagon/dffma.S",
+    "hexagon/dfminmax.S",
+    "hexagon/dfmul.S",
+    "hexagon/dfsqrt.S",
+    "hexagon/divdi3.S",
+    "hexagon/divsi3.S",
+    "hexagon/fastmath2_dlib_asm.S",
+    "hexagon/fastmath2_ldlib_asm.S",
+    "hexagon/fastmath_dlib_asm.S",
+    "hexagon/memcpy_forward_vp4cp4n2.S",
+    "hexagon/memcpy_likely_aligned.S",
+    "hexagon/moddi3.S",
+    "hexagon/modsi3.S",
+    "hexagon/sfdiv_opt.S",
+    "hexagon/sfsqrt_opt.S",
+    "hexagon/udivdi3.S",
+    "hexagon/udivmoddi4.S",
+    "hexagon/udivmodsi4.S",
+    "hexagon/udivsi3.S",
+    "hexagon/umoddi3.S",
+    "hexagon/umodsi3.S",
+  ]
+}
+if (current_cpu == "loongarch" || current_cpu == "loongarch64") {
+  builtins_sources -= [ "fp_mode.c" ]
+  builtins_sources += [ "loongarch/fp_mode.c" ]
+}
+
+if (current_cpu == "ppc64") {
+  builtins_sources += [
+    "ppc/divtc3.c",
+    "ppc/fixtfdi.c",
+    "ppc/fixtfti.c",
+    "ppc/fixunstfdi.c",
+    "ppc/fixunstfti.c",
+    "ppc/floatditf.c",
+    "ppc/floattitf.c",
+    "ppc/floatunditf.c",
+    "ppc/gcc_qadd.c",
+    "ppc/gcc_qdiv.c",
+    "ppc/gcc_qmul.c",
+    "ppc/gcc_qsub.c",
+    "ppc/multc3.c",
+  ]
+}
+
+if (current_cpu == "riscv" || current_cpu == "riscv64") {
+  builtins_sources += [
+    "cpu_model/riscv.c",
+    "riscv/fp_mode.c",
+    "riscv/restore.S",
+    "riscv/save.S",
+  ]
+}
+if (current_cpu == "riscv") {
+  builtins_sources += [ "riscv/mulsi3.S" ]
+}
+
+if (current_cpu == "riscv64") {
+  builtins_sources += [ "riscv/muldi3.S" ]
+}
+
+if (current_cpu == "ve") {
+  builtins_sources += [
+    "ve/grow_stack.S",
+    "ve/grow_stack_align.S",
+  ]
+}
+
+if (!compiler_rt_exclude_atomic_builtin) {
+  builtins_sources += [ "atomic.c" ]
+}

diff  --git a/llvm/utils/gn/secondary/compiler-rt/test/builtins/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/test/builtins/BUILD.gn
new file mode 100644
index 0000000000000..87848075a804e
--- /dev/null
+++ b/llvm/utils/gn/secondary/compiler-rt/test/builtins/BUILD.gn
@@ -0,0 +1,87 @@
+import("//compiler-rt/lib/builtins/sources.gni")
+import("//compiler-rt/target.gni")
+import("//compiler-rt/test/test.gni")
+import("//llvm/lib/Target/targets.gni")
+import("//llvm/utils/gn/build/toolchain/compiler.gni")
+import("//llvm/utils/gn/build/write_cmake_config.gni")
+import("//llvm/version.gni")
+
+write_cmake_config("builtins_mode_cfg") {
+  input = "Unit/lit.site.cfg.py.in"
+  output =
+      "$target_gen_dir/${crt_current_target_arch}BuiltinsConfig/lit.site.cfg.py"
+  values = [
+    "BUILTINS_TEST_CONFIG_SUFFIX=$crt_current_target_suffix",
+    "BUILTINS_LIT_SOURCE_DIR=" + rebase_path("."),
+    "BUILTINS_TEST_TARGET_ARCH=$crt_current_target_arch",
+    "SANITIZER_TEST_CXX_LIBNAME=libc++",
+    "COMPILER_RT_BUILD_CRT_PYBOOL=False",
+    "MSVC_PYBOOL=False",
+    "BUILTINS_IS_MSVC_PYBOOL=False",
+
+    "COMPILER_RT_BINARY_DIR=" + rebase_path("$root_gen_dir/compiler-rt"),
+    "LIT_SITE_CFG_IN_HEADER=## Autogenerated from $input, do not edit",
+  ]
+
+  features = ""
+  foreach(source, builtins_sources) {
+    if (features != "") {
+      features += ";"
+    }
+    features += "librt_has_" + get_path_info(source, "name")
+  }
+  values += [ "BUILTINS_LIT_SOURCE_FEATURES=$features" ]
+
+  cflags = ""
+  foreach(define, builtins_defines) {
+    cflags += " -D$define"
+  }
+  values += [ "BUILTINS_TEST_TARGET_CFLAGS=$cflags" ]
+}
+
+if (current_toolchain != host_toolchain) {
+  group("builtins_toolchain") {
+    deps = [
+      ":builtins_mode_cfg",
+      "//compiler-rt/include($host_toolchain)",
+      "//compiler-rt/lib/builtins",
+      "//compiler-rt/test:lit_common_configured",
+    ]
+  }
+}
+
+supported_toolchains = []
+if (host_os == "linux") {
+  supported_toolchains += [ "//llvm/utils/gn/build/toolchain:stage2_unix" ]
+}
+
+group("builtins") {
+  deps = []
+  foreach(toolchain, supported_toolchains) {
+    deps += [ ":builtins_toolchain($toolchain)" ]
+  }
+}
+
+if (supported_toolchains != []) {
+  action("check-builtins") {
+    script = "$root_build_dir/bin/llvm-lit"
+    args = [ "-sv" ]
+    foreach(toolchain, supported_toolchains) {
+      test_dir = rebase_path(
+              get_label_info(":lit_site_cfg($toolchain)", "target_gen_dir"),
+              root_build_dir)
+      args += [ test_dir + "/${crt_current_target_arch}BuiltinsConfig" ]
+    }
+    outputs = [ "$target_gen_dir/run-lit" ]  # Non-existing, so that ninja runs
+                                             # it each time.
+
+    # Since check-builtins is always dirty, //:default doesn't depend on it so
+    # that it's not part of the default ninja target.  Hence, check-builtins
+    # shouldn't have any deps except :builtins. so that the default target is
+    # sure to build all the deps.
+    deps = [ ":builtins" ]
+    testonly = true
+
+    pool = "//:console"
+  }
+}


        


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