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runtime: require explicit GC layouts

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This commit is contained in:
Jake Bailey
2026-08-07 10:21:19 -07:00
committed by Ron Evans
parent 1a4cb2032e
commit a7360d5ad3
28 changed files with 279 additions and 108 deletions
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transform/testdata/allocs.ll
Vendored
+13 -13
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@@ -7,7 +7,7 @@ declare nonnull ptr @runtime.alloc(i32, ptr)
; Test allocating a single int (i32) that should be allocated on the stack.
define void @testInt() {
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr null)
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
store i32 5, ptr %alloc
ret void
}
@@ -15,7 +15,7 @@ define void @testInt() {
; Test allocating an array of 3 i16 values that should be allocated on the
; stack.
define i16 @testArray() {
%alloc = call align 2 ptr @runtime.alloc(i32 6, ptr null)
%alloc = call align 2 ptr @runtime.alloc(i32 6, ptr inttoptr (i32 3 to ptr))
%alloc.1 = getelementptr i16, ptr %alloc, i32 1
store i16 5, ptr %alloc.1
%alloc.2 = getelementptr i16, ptr %alloc, i32 2
@@ -25,15 +25,15 @@ define i16 @testArray() {
; Test allocating objects with an unknown alignment.
define void @testUnknownAlign() {
%alloc32 = call ptr @runtime.alloc(i32 32, ptr null)
%alloc32 = call ptr @runtime.alloc(i32 32, ptr inttoptr (i32 3 to ptr))
store i8 5, ptr %alloc32
%alloc24 = call ptr @runtime.alloc(i32 24, ptr null)
%alloc24 = call ptr @runtime.alloc(i32 24, ptr inttoptr (i32 3 to ptr))
store i16 5, ptr %alloc24
%alloc12 = call ptr @runtime.alloc(i32 12, ptr null)
%alloc12 = call ptr @runtime.alloc(i32 12, ptr inttoptr (i32 3 to ptr))
store i16 5, ptr %alloc12
%alloc6 = call ptr @runtime.alloc(i32 6, ptr null)
%alloc6 = call ptr @runtime.alloc(i32 6, ptr inttoptr (i32 3 to ptr))
store i16 5, ptr %alloc6
%alloc3 = call ptr @runtime.alloc(i32 3, ptr null)
%alloc3 = call ptr @runtime.alloc(i32 3, ptr inttoptr (i32 3 to ptr))
store i16 5, ptr %alloc3
ret void
}
@@ -41,27 +41,27 @@ define void @testUnknownAlign() {
; Call a function that will let the pointer escape, so the heap-to-stack
; transform shouldn't be applied.
define void @testEscapingCall() {
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr null)
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%val = call ptr @escapeIntPtr(ptr %alloc)
ret void
}
define void @testEscapingCall2() {
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr null)
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%val = call ptr @escapeIntPtrSometimes(ptr %alloc, ptr %alloc)
ret void
}
; Call a function that doesn't let the pointer escape.
define void @testNonEscapingCall() {
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr null)
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%val = call ptr @noescapeIntPtr(ptr %alloc)
ret void
}
; Return the allocated value, which lets it escape.
define ptr @testEscapingReturn() {
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr null)
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
ret ptr %alloc
}
@@ -70,7 +70,7 @@ define void @testNonEscapingLoop() {
entry:
br label %loop
loop:
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr null)
%alloc = call align 4 ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%ptr = call ptr @noescapeIntPtr(ptr %alloc)
%result = icmp eq ptr null, %ptr
br i1 %result, label %loop, label %end
@@ -80,7 +80,7 @@ end:
; Test a zero-sized allocation.
define void @testZeroSizedAlloc() {
%alloc = call align 1 ptr @runtime.alloc(i32 0, ptr null)
%alloc = call align 1 ptr @runtime.alloc(i32 0, ptr inttoptr (i32 3 to ptr))
%ptr = call ptr @noescapeIntPtr(ptr %alloc)
ret void
}