10f4137cbd
A `"s"` input operand feeds a function/global symbol; the template's %[name] emits the platform-mangled name, so `bl %[fn]` / `call %[fn]` branches DIRECTLY to it (PC-relative, no register load — one fewer indirection than register-indirect `blr`). Lowering: an `"s"` input lowers its RHS normally (a function name → `ptr @fn`); the rejection added last commit is removed. Emit: a symbol operand is passed with its OWN llvm type (LLVMTypeOf) and no coercion — the function value is a `ptr`, and the old coerce-to-register-int path mistyped it and failed the verifier. New asmIsSymbol helper. Verified on aarch64: examples/1656 (sx → asm → bl _cb → sx → 42); the emitted asm is a direct `bl <_cb>` (objdump-confirmed), IR constraint `...,s,...`(ptr @cb). Flipped 1656 from the rejection lock to a runnable aarch64 example. zig build test green (665 corpus, 446 unit).
29 lines
787 B
Plaintext
29 lines
787 B
Plaintext
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; Function Attrs: nounwind
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define i64 @cb(i64 %0) #0 {
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entry:
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%alloca = alloca i64, align 8
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store i64 %0, ptr %alloca, align 8
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%load = load i64, ptr %alloca, align 8
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%add = add i64 %load, 1
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ret i64 %add
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}
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; Function Attrs: nounwind
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define internal i64 @tramp(i64 %0) #0 {
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entry:
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%alloca = alloca i64, align 8
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store i64 %0, ptr %alloca, align 8
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%load = load i64, ptr %alloca, align 8
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%asm = call i64 asm sideeffect " stp x29, x30, [sp, #-16]!\0A mov x0, ${1}\0A bl ${2}\0A mov ${0}, x0\0A ldp x29, x30, [sp], #16\0A", "=r,r,s,~{x0},~{x30},~{memory}"(i64 %load, ptr @cb)
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ret i64 %asm
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}
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; Function Attrs: nounwind
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define i32 @main() #0 {
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entry:
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%call = call i64 @tramp(i64 41)
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%ca.tr = trunc i64 %call to i32
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ret i32 %ca.tr
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}
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