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compiler: add //go:noheap pragma

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This commit is contained in:
Ayke van Laethem
2026-05-20 11:01:50 +02:00
committed by Ayke
parent 7b486e398a
commit 85d223c5e2
12 changed files with 135 additions and 10 deletions
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compiler/testdata/pragma.go
Vendored
+5
View File
@@ -115,3 +115,8 @@ func doesNotEscapeParam(a *int, b []int, c chan int, d *[0]byte)
//go:noescape
func stillEscapes(a *int, b []int, c chan int, d *[0]byte) {
}
//go:noheap
func doesHeapAlloc() *int {
return new(int)
}
compiler/testdata/pragma.ll
Vendored
+14
View File
@@ -90,6 +90,18 @@ entry:
ret void
}
; Function Attrs: nounwind
define hidden ptr @main.doesHeapAlloc(ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
%new = call align 4 dereferenceable(4) ptr @runtime.alloc_noheap(i32 4, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #10
call void @runtime.trackPointer(ptr nonnull %new, ptr nonnull %stackalloc, ptr undef) #10
ret ptr %new
}
; Function Attrs: allockind("alloc,zeroed") allocsize(0)
declare noalias nonnull ptr @runtime.alloc_noheap(i32, ptr, ptr) #9
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 "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="extern_func" }
@@ -99,3 +111,5 @@ attributes #5 = { noinline nounwind "target-features"="+bulk-memory,+bulk-memory
attributes #6 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="modulename" "wasm-import-name"="import1" }
attributes #7 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-import-module"="foobar" "wasm-import-name"="imported" }
attributes #8 = { nounwind "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "wasm-export-name"="exported" }
attributes #9 = { 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 #10 = { nounwind }