runtime (macOS): MoltenVK opened first, so a process holds one - the SDK's loader in /usr/local/lib loaded its own MoltenVK beside the linked one and the program drew through it; the loader only when a layer is asked for, pinned to ours (VK_DRIVER_FILES, lib/macos-arm64/MoltenVK_icd.json) unless a driver is named. steady's stream round: a 300-cell warm-up, then the least of three 150-cell windows
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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2e0a7f0031
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4 changed files with 134 additions and 17 deletions
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@ -39,20 +39,106 @@ entry:
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ret ptr %h
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}
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; the candidates in order: a Vulkan loader first (the SDK's, so the validation layer can be
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; stacked in development), then MoltenVK itself, which exports every vk* entry point and is what
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; a bundle ships in Contents/Frameworks - no loader, no ICD json - or, found through the
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; executable's rpath, what ludic.render3d carries (lib/macos-arm64) for every other build.
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@lvk_paths = internal constant [8 x ptr] [ptr @.lvk_c0, ptr @.lvk_c1, ptr @.lvk_c2, ptr @.lvk_c3, ptr @.lvk_m0, ptr @.lvk_mr, ptr @.lvk_m1, ptr @.lvk_m2]
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; The candidates in order. MoltenVK itself first - it exports every vk* entry point, it is what a bundle
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; ships in Contents/Frameworks and what ludic.render3d carries (lib/macos-arm64), and the program is
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; linked against it, so dlopen hands back the copy already loaded. A Vulkan loader (the SDK's, found
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; in /usr/local/lib) loads its OWN MoltenVK as an ICD: two in one process, each keeping its pools,
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; and the program drew through the SDK's. The loader comes first only when layers are asked for
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; (VK_INSTANCE_LAYERS, VK_LOADER_LAYERS_ENABLE, R3D_VK_LOADER), and is then pinned to ours (lvk_pin_icd).
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@lvk_direct = internal constant [8 x ptr] [ptr @.lvk_m0, ptr @.lvk_mr, ptr @.lvk_m1, ptr @.lvk_m2, ptr @.lvk_c0, ptr @.lvk_c1, ptr @.lvk_c2, ptr @.lvk_c3]
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@lvk_layered = internal constant [8 x ptr] [ptr @.lvk_c0, ptr @.lvk_c1, ptr @.lvk_c2, ptr @.lvk_c3, ptr @.lvk_m0, ptr @.lvk_mr, ptr @.lvk_m1, ptr @.lvk_m2]
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declare i32 @dladdr(ptr, ptr)
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declare i32 @setenv(ptr, ptr, i32)
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declare ptr @strrchr(ptr, i32)
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declare i32 @access(ptr, i32)
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@.lvk_e1 = private unnamed_addr constant [19 x i8] c"VK_INSTANCE_LAYERS\00"
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@.lvk_e2 = private unnamed_addr constant [24 x i8] c"VK_LOADER_LAYERS_ENABLE\00"
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@.lvk_e3 = private unnamed_addr constant [14 x i8] c"R3D_VK_LOADER\00"
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@.lvk_df = private unnamed_addr constant [16 x i8] c"VK_DRIVER_FILES\00"
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@.lvk_if = private unnamed_addr constant [17 x i8] c"VK_ICD_FILENAMES\00"
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@.lvk_gipa = private unnamed_addr constant [22 x i8] c"vkGetInstanceProcAddr\00"
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@.lvk_icd = private unnamed_addr constant [23 x i8] c"%.*s/MoltenVK_icd.json\00"
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; 1 when a layer is asked for: the loader is what stacks one
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define internal i32 @lvk_want_loader() {
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entry:
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%a = call ptr @getenv(ptr @.lvk_e1)
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%b = call ptr @getenv(ptr @.lvk_e2)
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%c = call ptr @getenv(ptr @.lvk_e3)
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%ha = icmp ne ptr %a, null
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%hb = icmp ne ptr %b, null
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%hc = icmp ne ptr %c, null
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%ab = or i1 %ha, %hb
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%abc = or i1 %ab, %hc
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%r = zext i1 %abc to i32
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ret i32 %r
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}
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; The loader told to use our MoltenVK and no other: VK_DRIVER_FILES set to the ICD json beside the
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; libMoltenVK.dylib the program is linked against (found through dladdr), unless the caller named a
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; driver already, or there is no json there (a bundle ships none).
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define internal void @lvk_pin_icd() {
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entry:
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%df = call ptr @getenv(ptr @.lvk_df)
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%if = call ptr @getenv(ptr @.lvk_if)
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%hdf = icmp ne ptr %df, null
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%hif = icmp ne ptr %if, null
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%named = or i1 %hdf, %hif
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br i1 %named, label %out, label %find
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find:
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%h = call ptr @dlopen(ptr @.lvk_mr, i32 6)
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%noh = icmp eq ptr %h, null
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br i1 %noh, label %out, label %sym
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sym:
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%f = call ptr @dlsym(ptr %h, ptr @.lvk_gipa)
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%nof = icmp eq ptr %f, null
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br i1 %nof, label %out, label %where
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where:
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%info = alloca [4 x ptr]
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%got = call i32 @dladdr(ptr %f, ptr %info)
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%nogot = icmp eq i32 %got, 0
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br i1 %nogot, label %out, label %dir
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dir:
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%fname = load ptr, ptr %info
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%slash = call ptr @strrchr(ptr %fname, i32 47)
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%noslash = icmp eq ptr %slash, null
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br i1 %noslash, label %out, label %json
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json:
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%pa = ptrtoint ptr %fname to i64
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%pb = ptrtoint ptr %slash to i64
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%len64 = sub i64 %pb, %pa
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%len = trunc i64 %len64 to i32
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%buf = alloca [1024 x i8]
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%w = call i32 (ptr, i64, ptr, ...) @snprintf(ptr %buf, i64 1024, ptr @.lvk_icd, i32 %len, ptr %fname)
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%acc = call i32 @access(ptr %buf, i32 0)
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%there = icmp eq i32 %acc, 0
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br i1 %there, label %pin, label %out
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pin:
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%s = call i32 @setenv(ptr @.lvk_df, ptr %buf, i32 0)
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br label %out
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out:
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ret void
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}
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define i32 @lvk_open() {
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entry:
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%have = load ptr, ptr @lvk_lib
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%open = icmp ne ptr %have, null
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br i1 %open, label %ok, label %loop
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br i1 %open, label %ok, label %pick
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pick:
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%wl = call i32 @lvk_want_loader()
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%layered = icmp ne i32 %wl, 0
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br i1 %layered, label %pinned, label %start
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pinned:
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call void @lvk_pin_icd()
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br label %start
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start:
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%paths = select i1 %layered, ptr @lvk_layered, ptr @lvk_direct
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br label %loop
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loop:
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%i = phi i32 [ 0, %entry ], [ %i1, %next ]
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%slot = getelementptr [8 x ptr], ptr @lvk_paths, i32 0, i32 %i
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%i = phi i32 [ 0, %start ], [ %i1, %next ]
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%slot = getelementptr [8 x ptr], ptr %paths, i32 0, i32 %i
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%path = load ptr, ptr %slot
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%h = call ptr @lvk_try(ptr %path)
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%miss = icmp eq ptr %h, null
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