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testdata: add generic alias identity regressions

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Add cases where same-named local aliases instantiate generic functions,
local types, and methods with float32 and float64. Record the current
collisions and incorrect results.
This commit is contained in:
Jake Bailey
2026-07-12 13:28:44 -07:00
committed by Ron Evans
parent 6d49f0177b
commit 73db9776b1
4 changed files with 215 additions and 18 deletions
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compiler/testdata/generics.go
Vendored
+37
View File
@@ -19,12 +19,49 @@ func Add[T Coord](a, b Point[T]) Point[T] {
}
}
func aliasSize[F float32 | float64]() uintptr {
return unsafe.Sizeof(F(0))
}
func aliasSize32() uintptr {
type F = float32
return aliasSize[F]()
}
func aliasSize64() uintptr {
type F = float64
return aliasSize[F]()
}
type aliasMethodResult[F float32 | float64] struct {
Value F
}
type aliasMethodValue[F float32 | float64] struct{}
func (aliasMethodValue[F]) Get() aliasMethodResult[F] {
return aliasMethodResult[F]{}
}
func main() {
var af, bf Point[float32]
Add(af, bf)
var ai, bi Point[int]
Add(ai, bi)
checkSize(aliasSize32())
checkSize(aliasSize64())
}
func checkSize(uintptr)
func checkBool(bool)
func aliasMethod32(x any) {
type F = float32
_, ok := x.(interface {
Get() aliasMethodResult[F]
})
checkBool(ok)
}
compiler/testdata/generics.ll
Vendored
+60 -17
View File
@@ -14,11 +14,35 @@ entry:
ret void
}
; Function Attrs: nounwind
define hidden i32 @main.aliasSize32(ptr %context) unnamed_addr #1 {
entry:
%0 = call i32 @"main.aliasSize[main.F]"(ptr undef)
ret i32 %0
}
; Function Attrs: nounwind
define linkonce_odr hidden i32 @"main.aliasSize[main.F]"(ptr %context) unnamed_addr #1 {
entry:
ret i32 4
}
; Function Attrs: nounwind
define hidden i32 @main.aliasSize64(ptr %context) unnamed_addr #1 {
entry:
%0 = call i32 @"main.aliasSize[main.F]"(ptr undef)
ret i32 %0
}
; Function Attrs: nounwind
define hidden void @main.main(ptr %context) unnamed_addr #1 {
entry:
%0 = call %"main.Point[float32]" @"main.Add[float32]"(float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, ptr undef)
%1 = call %"main.Point[int]" @"main.Add[int]"(i32 0, i32 0, i32 0, i32 0, ptr undef)
%2 = call i32 @main.aliasSize32(ptr undef)
call void @main.checkSize(i32 %2, ptr undef) #4
%3 = call i32 @main.aliasSize64(ptr undef)
call void @main.checkSize(i32 %3, ptr undef) #4
ret void
}
@@ -26,20 +50,20 @@ entry:
define linkonce_odr hidden %"main.Point[float32]" @"main.Add[float32]"(float %a.X, float %a.Y, float %b.X, float %b.Y, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
%a = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
call void @runtime.trackPointer(ptr nonnull %a, ptr nonnull %stackalloc, ptr undef) #3
%a = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #4
call void @runtime.trackPointer(ptr nonnull %a, ptr nonnull %stackalloc, ptr undef) #4
store float %a.X, ptr %a, align 4
%a.repack5 = getelementptr inbounds nuw i8, ptr %a, i32 4
store float %a.Y, ptr %a.repack5, align 4
%b = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
call void @runtime.trackPointer(ptr nonnull %b, ptr nonnull %stackalloc, ptr undef) #3
%b = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #4
call void @runtime.trackPointer(ptr nonnull %b, ptr nonnull %stackalloc, ptr undef) #4
store float %b.X, ptr %b, align 4
%b.repack7 = getelementptr inbounds nuw i8, ptr %b, i32 4
store float %b.Y, ptr %b.repack7, align 4
call void @main.checkSize(i32 4, ptr undef) #3
call void @main.checkSize(i32 8, ptr undef) #3
%complit = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
call void @runtime.trackPointer(ptr nonnull %complit, ptr nonnull %stackalloc, ptr undef) #3
call void @main.checkSize(i32 4, ptr undef) #4
call void @main.checkSize(i32 8, ptr undef) #4
%complit = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #4
call void @runtime.trackPointer(ptr nonnull %complit, ptr nonnull %stackalloc, ptr undef) #4
br i1 false, label %deref.throw, label %deref.next
deref.next: ; preds = %entry
@@ -89,20 +113,20 @@ declare void @runtime.nilPanic(ptr) #0
define linkonce_odr hidden %"main.Point[int]" @"main.Add[int]"(i32 %a.X, i32 %a.Y, i32 %b.X, i32 %b.Y, ptr %context) unnamed_addr #1 {
entry:
%stackalloc = alloca i8, align 1
%a = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
call void @runtime.trackPointer(ptr nonnull %a, ptr nonnull %stackalloc, ptr undef) #3
%a = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #4
call void @runtime.trackPointer(ptr nonnull %a, ptr nonnull %stackalloc, ptr undef) #4
store i32 %a.X, ptr %a, align 4
%a.repack5 = getelementptr inbounds nuw i8, ptr %a, i32 4
store i32 %a.Y, ptr %a.repack5, align 4
%b = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
call void @runtime.trackPointer(ptr nonnull %b, ptr nonnull %stackalloc, ptr undef) #3
%b = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #4
call void @runtime.trackPointer(ptr nonnull %b, ptr nonnull %stackalloc, ptr undef) #4
store i32 %b.X, ptr %b, align 4
%b.repack7 = getelementptr inbounds nuw i8, ptr %b, i32 4
store i32 %b.Y, ptr %b.repack7, align 4
call void @main.checkSize(i32 4, ptr undef) #3
call void @main.checkSize(i32 8, ptr undef) #3
%complit = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #3
call void @runtime.trackPointer(ptr nonnull %complit, ptr nonnull %stackalloc, ptr undef) #3
call void @main.checkSize(i32 4, ptr undef) #4
call void @main.checkSize(i32 8, ptr undef) #4
%complit = call align 4 dereferenceable(8) ptr @runtime.alloc(i32 8, ptr nonnull inttoptr (i32 3 to ptr), ptr undef) #4
call void @runtime.trackPointer(ptr nonnull %complit, ptr nonnull %stackalloc, ptr undef) #4
br i1 false, label %deref.throw, label %deref.next
deref.next: ; preds = %entry
@@ -141,7 +165,26 @@ deref.throw: ; preds = %store.next, %deref.
unreachable
}
declare void @main.checkBool(i1, ptr) #0
; Function Attrs: nounwind
define hidden void @main.aliasMethod32(ptr %x.typecode, ptr %x.value, ptr %context) unnamed_addr #1 {
entry:
%0 = call i1 @"interface:{Get:func:{}{named:main.aliasMethodResult[main.F]}}.$typeassert"(ptr %x.typecode) #4
br i1 %0, label %typeassert.ok, label %typeassert.next
typeassert.next: ; preds = %typeassert.ok, %entry
call void @main.checkBool(i1 %0, ptr undef) #4
ret void
typeassert.ok: ; preds = %entry
br label %typeassert.next
}
declare i1 @"interface:{Get:func:{}{named:main.aliasMethodResult[main.F]}}.$typeassert"(ptr) #3
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 = { 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 #3 = { nounwind }
attributes #3 = { "target-features"="+bulk-memory,+bulk-memory-opt,+call-indirect-overlong,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types" "tinygo-methods"="reflect/methods.Get() main.aliasMethodResult[main.F]" }
attributes #4 = { nounwind }