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compiler: add object layout information to heap allocations

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This commit adds object layout information to new heap allocations. It
is not yet used anywhere: the next commit will make use of it.

Object layout information will eventually be used for a (mostly) precise
garbage collector. This is what the data is made for. However, it is
also useful in the interp package which can work better if it knows the
memory layout and thus the approximate LLVM type of heap-allocated
objects.
This commit is contained in:
Ayke van Laethem
2021-07-09 23:41:50 +02:00
committed by Ron Evans
parent f24a93c51d
commit 0704794def
9 changed files with 400 additions and 13 deletions
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compiler/testdata/goroutine-wasm.ll
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+1 -1
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@@ -51,7 +51,7 @@ entry:
; Function Attrs: nounwind
define hidden void @main.closureFunctionGoroutine(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%n = call i8* @runtime.alloc(i32 4, i8* null, i8* undef, i8* null) #0
%n = call i8* @runtime.alloc(i32 4, i8* nonnull inttoptr (i32 3 to i8*), i8* undef, i8* null) #0
%0 = bitcast i8* %n to i32*
store i32 3, i32* %0, align 4
%1 = call i8* @runtime.alloc(i32 8, i8* null, i8* undef, i8* null) #0