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tint/transform: Implement div / mod polyfill

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Prevents UB for divide-by-zero and integer overflow when dividing

Fixed: tint:1349
Change-Id: Ieef66d27d7aec3011628ced076b2bccc7770a8af
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/108925
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
This commit is contained in:
Ben Clayton
2022-11-09 22:04:11 +00:00
committed by Dawn LUCI CQ
parent 9418152d08
commit 46ee63933c
427 changed files with 7255 additions and 3789 deletions
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37
test/tint/builtins/atomicStore/array/arrays.spvasm.expected.msl
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@@ -14,7 +14,15 @@ struct tint_array {
T elements[N];
};
void compute_main_inner(uint local_invocation_index, threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3>* const tint_symbol) {
uint tint_div(uint lhs, uint rhs) {
return (lhs / select(rhs, 1u, (rhs == 0u)));
}
uint tint_mod(uint lhs, uint rhs) {
return (lhs % select(rhs, 1u, (rhs == 0u)));
}
void compute_main_inner(uint local_invocation_index, threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3>* const tint_symbol_3) {
uint idx = 0u;
idx = local_invocation_index;
while (true) {
@@ -25,39 +33,42 @@ void compute_main_inner(uint local_invocation_index, threadgroup tint_array<tint
uint const x_31 = idx;
uint const x_33 = idx;
uint const x_35 = idx;
atomic_store_explicit(&((*(tint_symbol))[(x_31 / 2u)][(x_33 % 2u)][(x_35 % 1u)]), 0u, memory_order_relaxed);
uint const tint_symbol = tint_div(x_31, 2u);
uint const tint_symbol_1 = tint_mod(x_33, 2u);
uint const tint_symbol_2 = tint_mod(x_35, 1u);
atomic_store_explicit(&((*(tint_symbol_3))[tint_symbol][tint_symbol_1][tint_symbol_2]), 0u, memory_order_relaxed);
{
uint const x_42 = idx;
idx = (x_42 + 1u);
}
}
threadgroup_barrier(mem_flags::mem_threadgroup);
atomic_store_explicit(&((*(tint_symbol))[2][1][0]), 1u, memory_order_relaxed);
atomic_store_explicit(&((*(tint_symbol_3))[2][1][0]), 1u, memory_order_relaxed);
return;
}
void compute_main_1(thread uint* const tint_symbol_1, threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3>* const tint_symbol_2) {
uint const x_57 = *(tint_symbol_1);
compute_main_inner(x_57, tint_symbol_2);
void compute_main_1(thread uint* const tint_symbol_4, threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3>* const tint_symbol_5) {
uint const x_57 = *(tint_symbol_4);
compute_main_inner(x_57, tint_symbol_5);
return;
}
void compute_main_inner_1(uint local_invocation_index_1_param, threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3>* const tint_symbol_3, thread uint* const tint_symbol_4) {
void compute_main_inner_1(uint local_invocation_index_1_param, threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3>* const tint_symbol_6, thread uint* const tint_symbol_7) {
for(uint idx_1 = local_invocation_index_1_param; (idx_1 < 6u); idx_1 = (idx_1 + 1u)) {
uint const i = (idx_1 / 2u);
uint const i_1 = (idx_1 % 2u);
uint const i_2 = (idx_1 % 1u);
atomic_store_explicit(&((*(tint_symbol_3))[i][i_1][i_2]), 0u, memory_order_relaxed);
atomic_store_explicit(&((*(tint_symbol_6))[i][i_1][i_2]), 0u, memory_order_relaxed);
}
threadgroup_barrier(mem_flags::mem_threadgroup);
*(tint_symbol_4) = local_invocation_index_1_param;
compute_main_1(tint_symbol_4, tint_symbol_3);
*(tint_symbol_7) = local_invocation_index_1_param;
compute_main_1(tint_symbol_7, tint_symbol_6);
}
kernel void compute_main(uint local_invocation_index_1_param [[thread_index_in_threadgroup]]) {
threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3> tint_symbol_5;
thread uint tint_symbol_6 = 0u;
compute_main_inner_1(local_invocation_index_1_param, &(tint_symbol_5), &(tint_symbol_6));
threadgroup tint_array<tint_array<tint_array<atomic_uint, 1>, 2>, 3> tint_symbol_8;
thread uint tint_symbol_9 = 0u;
compute_main_inner_1(local_invocation_index_1_param, &(tint_symbol_8), &(tint_symbol_9));
return;
}