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Merged
merged 8 commits into from
Aug 12, 2024
Merged

Follow-up on std.Target GPU changes in #20960 #20985

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c11b997
llvm: Set vendor tag in target triple for GPU backends.
alexrp Aug 7, 2024
4e56653
llvm: Add a comment clarifying our mapping of the opencl OS tag.
alexrp Aug 7, 2024
1e1cd1f
Revert "std.Target: Fix C long double size for amdhsa, amdpal, and me…
alexrp Aug 8, 2024
93e9834
Revert "std.Target: Fix C long double size for opencl (8, not 16)."
alexrp Aug 8, 2024
ecf2069
Revert "std.Target: Fix C long long size for opencl (8, not 16)."
alexrp Aug 8, 2024
d415efd
Revert "std.Target: Fix C type alignment calculation for dxil."
alexrp Aug 8, 2024
1b6b881
Revert "std.Target: Fix ptrBitWidth_cpu_abi() for dxil (64-bit, not 3…
alexrp Aug 8, 2024
bf47cb4
std.Target: Fix C type alignment calculation for spirv.
alexrp Aug 8, 2024
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27 changes: 15 additions & 12 deletions lib/std/Target.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -1891,12 +1891,12 @@ pub fn ptrBitWidth_cpu_abi(cpu: Cpu, abi: Abi) u16 {
.sparc,
.spirv32,
.loongarch32,
.dxil,
.xtensa,
=> 32,

.aarch64,
.aarch64_be,
.dxil,
.mips64,
.mips64el,
.powerpc64,
Expand Down Expand Up @@ -2295,15 +2295,18 @@ pub fn c_type_bit_size(target: Target, c_type: CType) u16 {
.short, .ushort => return 16,
.int, .uint, .float => return 32,
.long, .ulong, .longlong, .ulonglong, .double => return 64,
.longdouble => return 64,
.longdouble => return 128,
},

.opencl, .vulkan => switch (c_type) {
.char => return 8,
.short, .ushort => return 16,
.int, .uint, .float => return 32,
.long, .ulong, .longlong, .ulonglong, .double => return 64,
.longdouble => return 64,
.long, .ulong, .double => return 64,
.longlong, .ulonglong => return 128,
// Note: The OpenCL specification does not guarantee a particular size for long double,
// but clang uses 128 bits.
.longdouble => return 128,
},

.ps4, .ps5 => switch (c_type) {
Expand Down Expand Up @@ -2378,6 +2381,7 @@ pub fn c_type_alignment(target: Target, c_type: CType) u16 {
.csky,
.x86,
.xcore,
.dxil,
.loongarch32,
.kalimba,
.spu_2,
Expand All @@ -2387,7 +2391,6 @@ pub fn c_type_alignment(target: Target, c_type: CType) u16 {
.amdgcn,
.bpfel,
.bpfeb,
.dxil,
.hexagon,
.m68k,
.mips,
Expand All @@ -2397,9 +2400,6 @@ pub fn c_type_alignment(target: Target, c_type: CType) u16 {
.nvptx,
.nvptx64,
.s390x,
.spirv,
.spirv32,
.spirv64,
=> 8,

.aarch64,
Expand All @@ -2414,6 +2414,9 @@ pub fn c_type_alignment(target: Target, c_type: CType) u16 {
.riscv32,
.riscv64,
.sparc64,
.spirv,
.spirv32,
.spirv64,
.x86_64,
.ve,
.wasm32,
Expand Down Expand Up @@ -2482,6 +2485,7 @@ pub fn c_type_preferred_alignment(target: Target, c_type: CType) u16 {

.csky,
.xcore,
.dxil,
.loongarch32,
.kalimba,
.spu_2,
Expand All @@ -2497,7 +2501,6 @@ pub fn c_type_preferred_alignment(target: Target, c_type: CType) u16 {
.amdgcn,
.bpfel,
.bpfeb,
.dxil,
.hexagon,
.x86,
.m68k,
Expand All @@ -2508,9 +2511,6 @@ pub fn c_type_preferred_alignment(target: Target, c_type: CType) u16 {
.nvptx,
.nvptx64,
.s390x,
.spirv,
.spirv32,
.spirv64,
=> 8,

.aarch64,
Expand All @@ -2525,6 +2525,9 @@ pub fn c_type_preferred_alignment(target: Target, c_type: CType) u16 {
.riscv32,
.riscv64,
.sparc64,
.spirv,
.spirv32,
.spirv64,
.x86_64,
.ve,
.wasm32,
Expand Down
11 changes: 9 additions & 2 deletions src/codegen/llvm.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,14 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![]const u8 {
.spu_2 => return error.@"LLVM backend does not support SPU Mark II",
};
try llvm_triple.appendSlice(llvm_arch);
try llvm_triple.appendSlice("-unknown-");

// Unlike CPU backends, GPU backends actually care about the vendor tag.
try llvm_triple.appendSlice(switch (target.cpu.arch) {
.amdgcn => if (target.os.tag == .mesa3d) "-mesa-" else "-amd-",
.nvptx, .nvptx64 => "-nvidia-",
.spirv64 => if (target.os.tag == .amdhsa) "-amd-" else "-unknown-",
else => "-unknown-",
});

const llvm_os = switch (target.os.tag) {
.freestanding => "unknown",
Expand All @@ -109,6 +116,7 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![]const u8 {
.cuda => "cuda",
.nvcl => "nvcl",
.amdhsa => "amdhsa",
.opencl => "unknown", // https://llvm.org/docs/SPIRVUsage.html#target-triples
.ps4 => "ps4",
.ps5 => "ps5",
.elfiamcu => "elfiamcu",
Expand All @@ -130,7 +138,6 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![]const u8 {
.serenity => "serenity",
.vulkan => "vulkan",

.opencl,
.glsl450,
.plan9,
.minix,
Expand Down