[bazel] Add support for building on s390x.

Tested with both GCC and Clang on s390x (under QEMU).
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Change-Id: Iad6609136e25a6e94d51f365e4c54e6f042aa897
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3346395Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78531}

BUILD.bazel

@@ -293,6 +293,10 @@ v8_config(
                 "CAN_USE_VFP3_INSTRUCTIONS",
             ],
             "@v8//bazel/config:v8_target_arm64": ["V8_TARGET_ARCH_ARM64"],
+            "@v8//bazel/config:v8_target_s390x": [
+                "V8_TARGET_ARCH_S390",
+                "V8_TARGET_ARCH_S390X",
+            ],
         },
         no_match_error = "Please specify a target cpu supported by v8",
     ) + select({
@@ -2195,6 +2199,37 @@ filegroup(
             "src/regexp/arm64/regexp-macro-assembler-arm64.h",
             "src/wasm/baseline/arm64/liftoff-assembler-arm64.h",
         ],
+        "@v8//bazel/config:v8_target_s390x": [
+            "src/baseline/s390/baseline-assembler-s390-inl.h",
+            "src/baseline/s390/baseline-compiler-s390-inl.h",
+            "src/codegen/s390/assembler-s390.cc",
+            "src/codegen/s390/assembler-s390.h",
+            "src/codegen/s390/assembler-s390-inl.h",
+            "src/codegen/s390/constants-s390.cc",
+            "src/codegen/s390/constants-s390.h",
+            "src/codegen/s390/cpu-s390.cc",
+            "src/codegen/s390/interface-descriptors-s390-inl.h",
+            "src/codegen/s390/macro-assembler-s390.cc",
+            "src/codegen/s390/macro-assembler-s390.h",
+            "src/codegen/s390/register-s390.h",
+            "src/compiler/backend/s390/code-generator-s390.cc",
+            "src/compiler/backend/s390/instruction-codes-s390.h",
+            "src/compiler/backend/s390/instruction-scheduler-s390.cc",
+            "src/compiler/backend/s390/instruction-selector-s390.cc",
+            "src/compiler/backend/s390/unwinding-info-writer-s390.cc",
+            "src/compiler/backend/s390/unwinding-info-writer-s390.h",
+            "src/deoptimizer/s390/deoptimizer-s390.cc",
+            "src/diagnostics/s390/disasm-s390.cc",
+            "src/diagnostics/s390/eh-frame-s390.cc",
+            "src/diagnostics/s390/unwinder-s390.cc",
+            "src/execution/s390/frame-constants-s390.cc",
+            "src/execution/s390/frame-constants-s390.h",
+            "src/execution/s390/simulator-s390.cc",
+            "src/execution/s390/simulator-s390.h",
+            "src/regexp/s390/regexp-macro-assembler-s390.cc",
+            "src/regexp/s390/regexp-macro-assembler-s390.h",
+            "src/wasm/baseline/s390/liftoff-assembler-s390.h",
+        ],
     }) + select({
         # Only for x64 builds and for arm64 with x64 host simulator.
         "@v8//bazel/config:is_posix_x64": [
@@ -2708,6 +2743,7 @@ filegroup(
         "@v8//bazel/config:v8_target_x64": ["src/builtins/x64/builtins-x64.cc"],
         "@v8//bazel/config:v8_target_arm": ["src/builtins/arm/builtins-arm.cc"],
         "@v8//bazel/config:v8_target_arm64": ["src/builtins/arm64/builtins-arm64.cc"],
+        "@v8//bazel/config:v8_target_s390x": ["src/builtins/s390/builtins-s390.cc"],
     }) + select({
         ":is_v8_enable_webassembly": [
             "src/builtins/builtins-wasm-gen.cc",
@@ -2828,6 +2864,7 @@ filegroup(
         "@v8//bazel/config:is_inline_asm_x64": ["src/heap/base/asm/x64/push_registers_asm.cc"],
         "@v8//bazel/config:is_inline_asm_arm": ["src/heap/base/asm/arm/push_registers_asm.cc"],
         "@v8//bazel/config:is_inline_asm_arm64": ["src/heap/base/asm/arm64/push_registers_asm.cc"],
+        "@v8//bazel/config:is_inline_asm_s390x": ["src/heap/base/asm/s390/push_registers_asm.cc"],
         "@v8//bazel/config:is_msvc_asm_ia32": ["src/heap/base/asm/ia32/push_registers_masm.S"],
         "@v8//bazel/config:is_msvc_asm_x64": ["src/heap/base/asm/x64/push_registers_masm.S"],
         "@v8//bazel/config:is_msvc_asm_arm64": ["src/heap/base/asm/arm64/push_registers_masm.S"],
@@ -2992,8 +3029,7 @@ filegroup(
             "google3/snapshots/ia32/noicu/embedded.S",
             "google3/snapshots/ia32/noicu/snapshot.cc",
         ],
-        "@v8//bazel/config:v8_target_arm64": [":noicu/generated_snapshot_files"],
-        "@v8//bazel/config:v8_target_x64": [":noicu/generated_snapshot_files"],
+        "//conditions:default": [":noicu/generated_snapshot_files"],
     }),
 )
 
@@ -3010,8 +3046,7 @@ filegroup(
             "google3/snapshots/ia32/icu/embedded.S",
             "google3/snapshots/ia32/icu/snapshot.cc",
         ],
-        "@v8//bazel/config:v8_target_arm64": [":icu/generated_snapshot_files"],
-        "@v8//bazel/config:v8_target_x64": [":icu/generated_snapshot_files"],
+        "//conditions:default": [":icu/generated_snapshot_files"],
     }),
 )
 

bazel/config/BUILD.bazel

@@ -49,6 +49,11 @@ config_setting(
     constraint_values = ["@platforms//cpu:arm"],
 )
 
+config_setting(
+    name = "platform_cpu_s390x",
+    constraint_values = ["@platforms//cpu:s390x"],
+)
+
 v8_target_cpu(
     name = "v8_target_cpu",
     build_setting_default = "none",
@@ -81,6 +86,11 @@ v8_configure_target_cpu(
     matching_configs = [":platform_cpu_arm"],
 )
 
+v8_configure_target_cpu(
+    name = "s390x",
+    matching_configs = [":platform_cpu_s390x"],
+)
+
 selects.config_setting_group(
     name = "v8_target_is_32_bits",
     match_any = [
@@ -124,6 +134,7 @@ selects.config_setting_group(
         ":v8_target_arm64",
         ":is_x64",
         ":is_arm64",
+        ":is_s390x",
     ],
 )
 
@@ -172,6 +183,11 @@ selects.config_setting_group(
     match_all = [":is_posix", ":is_arm"],
 )
 
+selects.config_setting_group(
+    name = "is_inline_asm_s390x",
+    match_all = [":is_posix", ":is_s390x"],
+)
+
 selects.config_setting_group(
     name = "is_msvc_asm_x64",
     match_all = [":is_windows", ":is_x64"],
@@ -225,6 +241,14 @@ selects.config_setting_group(
     ],
 )
 
+selects.config_setting_group(
+    name = "is_clang_s390x",
+    match_all = [
+        ":is_clang",
+        ":is_s390x",
+    ],
+)
+
 config_setting(
     name = "is_compiler_gcc",
     flag_values = {

bazel/config/v8-target-cpu.bzl

@@ -14,7 +14,7 @@ V8CpuTypeInfo = provider(
 )
 
 def _host_target_cpu_impl(ctx):
-    allowed_values = ["arm", "arm64", "ia32", "x64", "none"]
+    allowed_values = ["arm", "arm64", "ia32", "s390x", "x64", "none"]
     cpu_type = ctx.build_setting_value
     if cpu_type in allowed_values:
         return V8CpuTypeInfo(value = cpu_type)

bazel/defs.bzl

@@ -146,6 +146,11 @@ def _default_args():
                 "-O1",
             ],
             "//conditions:default": [],
+        }) + select({
+            "@v8//bazel/config:is_clang_s390x": [
+                "-fno-integrated-as",
+            ],
+            "//conditions:default": [],
         }),
         includes = ["include"],
         linkopts = select({
@@ -378,6 +383,7 @@ def _v8_target_cpu_transition_impl(settings, attr):
         "arm64-v8a": "arm64",
         "arm": "arm64",
         "armeabi-v7a": "arm32",
+        "s390x": "s390x",
     }
     v8_target_cpu = mapping[settings["//command_line_option:cpu"]]
     return {"@v8//bazel/config:v8_target_cpu": v8_target_cpu}