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compiler: clean up pointer pack code

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This means runtime.alloc isn't allocated every time but instead only
when it is actually needed. It also just cleans up the compiler code a
little bit, and makes the next commit a bit nicer.
This commit is contained in:
Ayke van Laethem
2026-05-20 11:07:35 +02:00
committed by Ayke
parent da69f18e91
commit 7b486e398a
19 changed files with 380 additions and 429 deletions
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compiler/testdata/go1.20.ll
Vendored
+13 -17
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@@ -5,27 +5,24 @@ target triple = "wasm32-unknown-wasi"
%runtime._string = type { ptr, i32 }
; Function Attrs: allockind("alloc,zeroed") allocsize(0)
declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1
declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #0
; Function Attrs: nounwind
define hidden void @main.init(ptr %context) unnamed_addr #2 {
define hidden void @main.init(ptr %context) unnamed_addr #1 {
entry:
ret void
}
; Function Attrs: nounwind
define hidden ptr @main.unsafeSliceData(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #2 {
define hidden ptr @main.unsafeSliceData(ptr %s.data, i32 %s.len, i32 %s.cap, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #3
call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #2
ret ptr %s.data
}
; Function Attrs: nounwind
define hidden %runtime._string @main.unsafeString(ptr dereferenceable_or_null(1) %ptr, i16 %len, ptr %context) unnamed_addr #2 {
define hidden %runtime._string @main.unsafeString(ptr dereferenceable_or_null(1) %ptr, i16 %len, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
%0 = icmp slt i16 %len, 0
@@ -39,25 +36,24 @@ unsafe.String.next: ; preds = %entry
%5 = zext nneg i16 %len to i32
%6 = insertvalue %runtime._string undef, ptr %ptr, 0
%7 = insertvalue %runtime._string %6, i32 %5, 1
call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #3
call void @runtime.trackPointer(ptr %ptr, ptr nonnull %stackalloc, ptr undef) #2
ret %runtime._string %7
unsafe.String.throw: ; preds = %entry
call void @runtime.unsafeSlicePanic(ptr undef) #3
call void @runtime.unsafeSlicePanic(ptr undef) #2
unreachable
}
declare void @runtime.unsafeSlicePanic(ptr) #1
declare void @runtime.unsafeSlicePanic(ptr) #0
; Function Attrs: nounwind
define hidden ptr @main.unsafeStringData(ptr readonly %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
define hidden ptr @main.unsafeStringData(ptr readonly %s.data, i32 %s.len, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #3
call void @runtime.trackPointer(ptr %s.data, ptr nonnull %stackalloc, ptr undef) #2
ret ptr %s.data
}
attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
attributes #1 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
attributes #2 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
attributes #3 = { nounwind }
attributes #0 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
attributes #1 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" }
attributes #2 = { nounwind }