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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/pointer.ll
Vendored
+12 -16
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@@ -3,48 +3,44 @@ source_filename = "pointer.go"
target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20"
target triple = "wasm32-unknown-wasi"
; 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 [0 x i32] @main.pointerDerefZero(ptr %x, ptr %context) unnamed_addr #2 {
define hidden [0 x i32] @main.pointerDerefZero(ptr %x, ptr %context) unnamed_addr #1 {
entry:
ret [0 x i32] zeroinitializer
}
; Function Attrs: nounwind
define hidden ptr @main.pointerCastFromUnsafe(ptr %x, ptr %context) unnamed_addr #2 {
define hidden ptr @main.pointerCastFromUnsafe(ptr %x, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #3
call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #2
ret ptr %x
}
; Function Attrs: nounwind
define hidden ptr @main.pointerCastToUnsafe(ptr dereferenceable_or_null(4) %x, ptr %context) unnamed_addr #2 {
define hidden ptr @main.pointerCastToUnsafe(ptr dereferenceable_or_null(4) %x, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #3
call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #2
ret ptr %x
}
; Function Attrs: nounwind
define hidden ptr @main.pointerCastToUnsafeNoop(ptr dereferenceable_or_null(1) %x, ptr %context) unnamed_addr #2 {
define hidden ptr @main.pointerCastToUnsafeNoop(ptr dereferenceable_or_null(1) %x, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #3
call void @runtime.trackPointer(ptr %x, ptr nonnull %stackalloc, ptr undef) #2
ret ptr %x
}
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 }