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[Bazel] Export compiler-rt builtins sources
This provides a structured collection of the source files used in the compiler-rt builtins library in Bazel. Normal build rules often don't work for runtime libraries as they may need to be built for a specific target platform and in an environment with the associated SDK available to build for that target. Instead, this PR exports the sources in a structured way that can be used by downstream users to collect and build these runtimes in a target-appropriate manner. Currently, this includes AArch64, AArch32 (with and without VFP), x86-64, i386, PPC, and RISC-V. Where I could see a useful division of functionality, those are also exposed. The rules use over-wide globs to minimize the need to manually update lists of files or to risk things slipping out of date.
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  • utils/bazel/llvm-project-overlay/compiler-rt

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‎utils/bazel/llvm-project-overlay/compiler-rt/BUILD.bazel‎

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@@ -113,3 +113,285 @@ cc_library(
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":orc_rt_common_headers",
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],
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)
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BUILTINS_CRTBEGIN_SRCS = ["lib/builtins/crtbegin.c"]
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filegroup(
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name = "builtins_crtbegin_src",
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srcs = BUILTINS_CRTBEGIN_SRCS,
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)
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BUILTINS_CRTEND_SRCS = ["lib/builtins/crtend.c"]
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filegroup(
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name = "builtins_crtend_src",
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srcs = BUILTINS_CRTEND_SRCS,
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)
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BUILTINS_HOSTED_SRCS = [
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"lib/builtins/clear_cache.c",
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"lib/builtins/emutls.c",
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"lib/builtins/enable_execute_stack.c",
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"lib/builtins/eprintf.c",
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]
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# Source files in the builtins library that build on top of libc and are only
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# appropriate in hosted environments.
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filegroup(
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name = "builtins_hosted_srcs",
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srcs = BUILTINS_HOSTED_SRCS,
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)
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BUILTINS_BF16_SRCS_PATTERNS = [
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"lib/builtins/*bf*.c",
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]
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# Source files for the 16-bit Brain floating-point number builtins.
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filegroup(
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name = "builtins_bf16_srcs",
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srcs = glob(
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BUILTINS_BF16_SRCS_PATTERNS,
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allow_empty = True,
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),
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)
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BUILTINS_X86_FP80_SRCS_PATTERNS = [
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# `xc` marks 80-bit complex number builtins.
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"lib/builtins/*xc*.c",
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# `xf` marks 80-bit floating-point builtins.
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"lib/builtins/*xf*.c",
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]
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# Source files for the 80-bit floating-point and complex number builtins.
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filegroup(
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name = "builtins_x86_fp80_srcs",
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srcs = glob(
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BUILTINS_X86_FP80_SRCS_PATTERNS,
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allow_empty = True,
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exclude = BUILTINS_BF16_SRCS_PATTERNS,
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),
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)
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BUILTINS_TF_SRCS_PATTERNS = [
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# `tc` marks 128-bit complex number builtins.
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"lib/builtins/*tc*.c",
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# `tf` marks 128-bit floating-point builtins.
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"lib/builtins/*tf*.c",
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]
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BUILTINS_TF_EXCLUDES = (
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BUILTINS_HOSTED_SRCS +
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BUILTINS_BF16_SRCS_PATTERNS +
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BUILTINS_X86_FP80_SRCS_PATTERNS
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)
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# Source files for the 128-bit floating-point and complex number builtins.
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filegroup(
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name = "builtins_tf_srcs",
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srcs = glob(
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BUILTINS_TF_SRCS_PATTERNS,
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allow_empty = True,
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exclude = BUILTINS_TF_EXCLUDES,
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),
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)
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BUILTINS_MACOS_ATOMIC_SRCS_PATTERNS = [
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"lib/builtins/atomic_*.c",
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]
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# Source files for macOS atomic builtins.
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filegroup(
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name = "builtins_macos_atomic_srcs",
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srcs = glob(
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BUILTINS_MACOS_ATOMIC_SRCS_PATTERNS,
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allow_empty = True,
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),
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)
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# A list of (pat, size, model) tuples for AArch64's outline atomics.
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AARCH64_OUTLINE_ATOMICS = [
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(pat, size, model)
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for pat in [
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"cas",
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"swp",
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"ldadd",
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"ldclr",
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"ldeor",
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"ldset",
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]
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for size in [
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"1",
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"2",
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"4",
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"8",
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"16",
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]
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for model in [
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"1",
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"2",
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"3",
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"4",
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]
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if pat == "cas" or size != "16"
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]
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AARCH64_OUTLINE_ATOMICS_FMT = "lib/builtins/aarch64/outline_atomic_{0}_{1}_{2}.S"
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# lse.S is compiled multiple times with different macros as the input. Model
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# this as a genrule producing individual files with the macros at the start.
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[[genrule(
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name = "builtins_aarch64_outline_atomic_" + pat + size + "_" + model,
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srcs = ["lib/builtins/aarch64/lse.S"],
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outs = [AARCH64_OUTLINE_ATOMICS_FMT.format(pat, size, model)],
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cmd = (
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"echo '#define L_" + pat + "' >> $(OUTS) && " +
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"echo '#define SIZE " + size + "' >> $(OUTS) && " +
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"echo '#define MODEL " + model + "' >> $(OUTS) && " +
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"cat $(SRCS) >> $(OUTS)"
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),
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)] for (pat, size, model) in AARCH64_OUTLINE_ATOMICS]
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# Source files for the AArch64 architecture-specific builtins.
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filegroup(
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name = "builtins_aarch64_srcs",
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srcs = [
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"lib/builtins/cpu_model/aarch64.c",
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"lib/builtins/cpu_model/aarch64.h",
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] + [
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AARCH64_OUTLINE_ATOMICS_FMT.format(pat, size, model)
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for (pat, size, model) in AARCH64_OUTLINE_ATOMICS
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] + glob(
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[
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"lib/builtins/cpu_model/AArch64*.inc",
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"lib/builtins/cpu_model/aarch64/**/*.inc",
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"lib/builtins/aarch64/*.S",
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"lib/builtins/aarch64/*.c",
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"lib/builtins/aarch64/*.cpp",
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],
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allow_empty = True,
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exclude = [
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# This file isn't intended to directly compile, and instead is used
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# above to generate a collection of outline atomic helpers.
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"lib/builtins/aarch64/lse.S",
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],
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),
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)
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BUILTINS_ARM_VFP_SRCS_PATTERNS = [
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"lib/builtins/arm/*vfp*.S",
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"lib/builtins/arm/*vfp*.c",
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"lib/builtins/arm/*vfp*.cpp",
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]
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# Source files for the ARM VFP-specific builtins.
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filegroup(
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name = "builtins_arm_vfp_srcs",
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srcs = glob(
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BUILTINS_ARM_VFP_SRCS_PATTERNS,
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allow_empty = True,
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),
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)
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# Source files for the ARM architecture-specific builtins.
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filegroup(
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name = "builtins_arm_srcs",
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srcs = glob(
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[
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"lib/builtins/arm/*.S",
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"lib/builtins/arm/*.c",
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"lib/builtins/arm/*.cpp",
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],
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allow_empty = True,
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exclude = BUILTINS_ARM_VFP_SRCS_PATTERNS,
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),
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)
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# Source files for the PPC architecture-specific builtins.
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filegroup(
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name = "builtins_ppc_srcs",
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srcs = glob(
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[
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"lib/builtins/ppc/*.S",
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"lib/builtins/ppc/*.c",
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"lib/builtins/ppc/*.cpp",
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],
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allow_empty = True,
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),
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)
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# Source files for the RISC-V architecture-specific builtins.
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filegroup(
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name = "builtins_riscv_srcs",
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srcs = glob(
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[
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"lib/builtins/riscv/*.S",
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"lib/builtins/riscv/*.c",
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"lib/builtins/riscv/*.cpp",
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],
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allow_empty = True,
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),
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)
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# Source files for the x86 architecture specific builtins (both 32-bit and
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# 64-bit).
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filegroup(
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name = "builtins_x86_arch_srcs",
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srcs = [
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"lib/builtins/cpu_model/x86.c",
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"lib/builtins/i386/fp_mode.c",
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],
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)
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# Source files for the x86-64 architecture specific builtins.
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filegroup(
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name = "builtins_x86_64_srcs",
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srcs = glob(
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[
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"lib/builtins/x86_64/*.c",
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"lib/builtins/x86_64/*.cpp",
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"lib/builtins/x86_64/*.S",
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],
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allow_empty = True,
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),
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)
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# Source files for the 32-bit-specific x86 architecture specific builtins.
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filegroup(
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name = "builtins_i386_srcs",
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srcs = glob(
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[
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"lib/builtins/i386/*.S",
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"lib/builtins/i386/*.c",
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"lib/builtins/i386/*.cpp",
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],
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allow_empty = True,
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exclude = [
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# This file is used for both i386 and x86_64 and so included in the
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# broader x86 sources.
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"lib/builtins/i386/fp_mode.c",
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],
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),
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)
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# Source files for portable components of the compiler builtins library.
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filegroup(
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name = "builtins_generic_srcs",
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srcs = ["lib/builtins/cpu_model/cpu_model.h"] + glob(
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[
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"lib/builtins/*.c",
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"lib/builtins/*.cpp",
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"lib/builtins/*.h",
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"lib/builtins/*.inc",
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],
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allow_empty = True,
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exclude = (
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BUILTINS_CRTBEGIN_SRCS +
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BUILTINS_CRTEND_SRCS +
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BUILTINS_TF_EXCLUDES +
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BUILTINS_TF_SRCS_PATTERNS +
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BUILTINS_MACOS_ATOMIC_SRCS_PATTERNS
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),
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),
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)

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