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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/gc-stackslots.out.ll
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+8 -8
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@@ -21,7 +21,7 @@ define ptr @needsStackSlots() {
%2 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 0
store ptr %1, ptr %2, align 4
store ptr %gc.stackobject, ptr @runtime.stackChainStart, align 4
%ptr = call ptr @runtime.alloc(i32 4, ptr null)
%ptr = call ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%3 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 2
store ptr %ptr, ptr %3, align 4
call void @someArbitraryFunction()
@@ -47,7 +47,7 @@ define ptr @needsStackSlots2() {
%ptr2 = getelementptr i8, ptr @someGlobal, i32 0
%6 = getelementptr { ptr, i32, ptr, ptr, ptr, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 5
store ptr %ptr2, ptr %6, align 4
%unused = call ptr @runtime.alloc(i32 4, ptr null)
%unused = call ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%7 = getelementptr { ptr, i32, ptr, ptr, ptr, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 6
store ptr %unused, ptr %7, align 4
store ptr %1, ptr @runtime.stackChainStart, align 4
@@ -69,7 +69,7 @@ define ptr @fibNext(ptr %x, ptr %y) {
%x.val = load i8, ptr %x, align 1
%y.val = load i8, ptr %y, align 1
%out.val = add i8 %x.val, %y.val
%out.alloc = call ptr @runtime.alloc(i32 1, ptr null)
%out.alloc = call ptr @runtime.alloc(i32 1, ptr inttoptr (i32 3 to ptr))
%3 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 2
store ptr %out.alloc, ptr %3, align 4
store i8 %out.val, ptr %out.alloc, align 1
@@ -85,10 +85,10 @@ entry:
%1 = getelementptr { ptr, i32, ptr, ptr, ptr, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 0
store ptr %0, ptr %1, align 4
store ptr %gc.stackobject, ptr @runtime.stackChainStart, align 4
%entry.x = call ptr @runtime.alloc(i32 1, ptr null)
%entry.x = call ptr @runtime.alloc(i32 1, ptr inttoptr (i32 3 to ptr))
%2 = getelementptr { ptr, i32, ptr, ptr, ptr, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 2
store ptr %entry.x, ptr %2, align 4
%entry.y = call ptr @runtime.alloc(i32 1, ptr null)
%entry.y = call ptr @runtime.alloc(i32 1, ptr inttoptr (i32 3 to ptr))
%3 = getelementptr { ptr, i32, ptr, ptr, ptr, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 3
store ptr %entry.y, ptr %3, align 4
store i8 1, ptr %entry.y, align 1
@@ -126,7 +126,7 @@ define void @testGEPBitcast() {
%arr.bitcast = getelementptr [32 x i8], ptr %arr, i32 0, i32 0
%3 = getelementptr { ptr, i32, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 2
store ptr %arr.bitcast, ptr %3, align 4
%other = call ptr @runtime.alloc(i32 1, ptr null)
%other = call ptr @runtime.alloc(i32 1, ptr inttoptr (i32 3 to ptr))
%4 = getelementptr { ptr, i32, ptr, ptr }, ptr %gc.stackobject, i32 0, i32 3
store ptr %other, ptr %4, align 4
store ptr %1, ptr @runtime.stackChainStart, align 4
@@ -144,7 +144,7 @@ define void @earlyPopRegression() {
%2 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 0
store ptr %1, ptr %2, align 4
store ptr %gc.stackobject, ptr @runtime.stackChainStart, align 4
%x.alloc = call ptr @runtime.alloc(i32 4, ptr null)
%x.alloc = call ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%3 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 2
store ptr %x.alloc, ptr %3, align 4
call void @allocAndSave(ptr %x.alloc)
@@ -159,7 +159,7 @@ define void @allocAndSave(ptr %x) {
%2 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 0
store ptr %1, ptr %2, align 4
store ptr %gc.stackobject, ptr @runtime.stackChainStart, align 4
%y = call ptr @runtime.alloc(i32 4, ptr null)
%y = call ptr @runtime.alloc(i32 4, ptr inttoptr (i32 3 to ptr))
%3 = getelementptr { ptr, i32, ptr }, ptr %gc.stackobject, i32 0, i32 2
store ptr %y, ptr %3, align 4
store ptr %y, ptr %x, align 4