[bazel] Add support for building on ppc64le.

Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Change-Id: I23135214a6cf78122b35ed7d43c7fa22a8ece34e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3375471Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78534}

BUILD.bazel

@@ -302,6 +302,11 @@ v8_config(
                 "V8_TARGET_ARCH_RISCV64",
                 "CAN_USE_FPU_INSTRUCTIONS",
             ],
+            "@v8//bazel/config:v8_target_ppc64le": [
+                # NOTE: Bazel rules for ppc64le weren't tested on a real system.
+                "V8_TARGET_ARCH_PPC64",
+                "V8_TARGET_ARCH_PPC_LE",
+            ],
         },
         no_match_error = "Please specify a target cpu supported by v8",
     ) + select({
@@ -2263,6 +2268,37 @@ filegroup(
             "src/regexp/riscv64/regexp-macro-assembler-riscv64.h",
             "src/wasm/baseline/riscv64/liftoff-assembler-riscv64.h",
         ],
+        "@v8//bazel/config:v8_target_ppc64le": [
+            "src/baseline/ppc/baseline-assembler-ppc-inl.h",
+            "src/baseline/ppc/baseline-compiler-ppc-inl.h",
+            "src/codegen/ppc/assembler-ppc.cc",
+            "src/codegen/ppc/assembler-ppc.h",
+            "src/codegen/ppc/assembler-ppc-inl.h",
+            "src/codegen/ppc/constants-ppc.cc",
+            "src/codegen/ppc/constants-ppc.h",
+            "src/codegen/ppc/cpu-ppc.cc",
+            "src/codegen/ppc/interface-descriptors-ppc-inl.h",
+            "src/codegen/ppc/macro-assembler-ppc.cc",
+            "src/codegen/ppc/macro-assembler-ppc.h",
+            "src/codegen/ppc/register-ppc.h",
+            "src/compiler/backend/ppc/code-generator-ppc.cc",
+            "src/compiler/backend/ppc/instruction-codes-ppc.h",
+            "src/compiler/backend/ppc/instruction-scheduler-ppc.cc",
+            "src/compiler/backend/ppc/instruction-selector-ppc.cc",
+            "src/compiler/backend/ppc/unwinding-info-writer-ppc.cc",
+            "src/compiler/backend/ppc/unwinding-info-writer-ppc.h",
+            "src/deoptimizer/ppc/deoptimizer-ppc.cc",
+            "src/diagnostics/ppc/disasm-ppc.cc",
+            "src/diagnostics/ppc/eh-frame-ppc.cc",
+            "src/diagnostics/ppc/unwinder-ppc.cc",
+            "src/execution/ppc/frame-constants-ppc.cc",
+            "src/execution/ppc/frame-constants-ppc.h",
+            "src/execution/ppc/simulator-ppc.cc",
+            "src/execution/ppc/simulator-ppc.h",
+            "src/regexp/ppc/regexp-macro-assembler-ppc.cc",
+            "src/regexp/ppc/regexp-macro-assembler-ppc.h",
+            "src/wasm/baseline/ppc/liftoff-assembler-ppc.h",
+        ],
     }) + select({
         # Only for x64 builds and for arm64 with x64 host simulator.
         "@v8//bazel/config:is_posix_x64": [
@@ -2778,6 +2814,7 @@ filegroup(
         "@v8//bazel/config:v8_target_arm64": ["src/builtins/arm64/builtins-arm64.cc"],
         "@v8//bazel/config:v8_target_s390x": ["src/builtins/s390/builtins-s390.cc"],
         "@v8//bazel/config:v8_target_riscv64": ["src/builtins/riscv64/builtins-riscv64.cc"],
+        "@v8//bazel/config:v8_target_ppc64le": ["src/builtins/ppc/builtins-ppc.cc"],
     }) + select({
         ":is_v8_enable_webassembly": [
             "src/builtins/builtins-wasm-gen.cc",
@@ -2900,6 +2937,7 @@ filegroup(
         "@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_inline_asm_riscv64": ["src/heap/base/asm/riscv64/push_registers_asm.cc"],
+        "@v8//bazel/config:is_inline_asm_ppc64le": ["src/heap/base/asm/ppc/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"],

bazel/config/BUILD.bazel

@@ -59,6 +59,11 @@ config_setting(
     constraint_values = ["@platforms//cpu:riscv64"],
 )
 
+config_setting(
+    name = "platform_cpu_ppc64le",
+    constraint_values = ["@platforms//cpu:ppc"],
+)
+
 v8_target_cpu(
     name = "v8_target_cpu",
     build_setting_default = "none",
@@ -101,6 +106,11 @@ v8_configure_target_cpu(
     matching_configs = [":platform_cpu_riscv64"],
 )
 
+v8_configure_target_cpu(
+    name = "ppc64le",
+    matching_configs = [":platform_cpu_ppc64le"],
+)
+
 selects.config_setting_group(
     name = "v8_target_is_32_bits",
     match_any = [
@@ -146,6 +156,7 @@ selects.config_setting_group(
         ":is_arm64",
         ":is_s390x",
         ":is_riscv64",
+        ":is_ppc64le",
     ],
 )
 
@@ -204,6 +215,11 @@ selects.config_setting_group(
     match_all = [":is_posix", ":is_riscv64"],
 )
 
+selects.config_setting_group(
+    name = "is_inline_asm_ppc64le",
+    match_all = [":is_posix", ":is_ppc64le"],
+)
+
 selects.config_setting_group(
     name = "is_msvc_asm_x64",
     match_all = [":is_windows", ":is_x64"],

bazel/config/v8-target-cpu.bzl

@@ -14,7 +14,7 @@ V8CpuTypeInfo = provider(
 )
 
 def _host_target_cpu_impl(ctx):
-    allowed_values = ["arm", "arm64", "ia32", "riscv64", "s390x", "x64", "none"]
+    allowed_values = ["arm", "arm64", "ia32", "ppc64le", "riscv64", "s390x", "x64", "none"]
     cpu_type = ctx.build_setting_value
     if cpu_type in allowed_values:
         return V8CpuTypeInfo(value = cpu_type)

bazel/defs.bzl

@@ -378,13 +378,13 @@ def _v8_target_cpu_transition_impl(settings, attr):
         "darwin_x86_64": "x64",
         "x64_windows": "x64",
         "x86": "ia32",
-        "ppc": "ppc64",
         "aarch64": "arm64",
         "arm64-v8a": "arm64",
         "arm": "arm64",
         "armeabi-v7a": "arm32",
         "s390x": "s390x",
         "riscv64": "riscv64",
+        "ppc": "ppc64le",
     }
     v8_target_cpu = mapping[settings["//command_line_option:cpu"]]
     return {"@v8//bazel/config:v8_target_cpu": v8_target_cpu}