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transform (gc): track phi nodes in stack slots

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This commit is contained in:
Jaden Weiss
2020-04-01 17:18:57 -04:00
committed by Ayke
parent 6647c43a7b
commit ae16b2c922
3 changed files with 106 additions and 2 deletions
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transform/testdata/gc-stackslots.ll
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+34
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@@ -50,3 +50,37 @@ define i8* @noAllocatingFunction() {
call void @runtime.trackPointer(i8* %ptr)
ret i8* %ptr
}
define i8* @fibNext(i8* %x, i8* %y) {
%x.val = load i8, i8* %x
%y.val = load i8, i8* %y
%out.val = add i8 %x.val, %y.val
%out.alloc = call i8* @runtime.alloc(i32 1)
call void @runtime.trackPointer(i8* %out.alloc)
store i8 %out.val, i8* %out.alloc
ret i8* %out.alloc
}
define i8* @allocLoop() {
entry:
%entry.x = call i8* @runtime.alloc(i32 1)
call void @runtime.trackPointer(i8* %entry.x)
%entry.y = call i8* @runtime.alloc(i32 1)
call void @runtime.trackPointer(i8* %entry.y)
store i8 1, i8* %entry.y
br label %loop
loop:
%prev.y = phi i8* [ %entry.y, %entry ], [ %prev.x, %loop ]
%prev.x = phi i8* [ %entry.x, %entry ], [ %next.x, %loop ]
call void @runtime.trackPointer(i8* %prev.x)
call void @runtime.trackPointer(i8* %prev.y)
%next.x = call i8* @fibNext(i8* %prev.x, i8* %prev.y)
call void @runtime.trackPointer(i8* %next.x)
%next.x.val = load i8, i8* %next.x
%loop.done = icmp ult i8 40, %next.x.val
br i1 %loop.done, label %end, label %loop
end:
ret i8* %next.x
}