James Price a5d73ce965 transform/shader_io: Generate a wrapper function
This is a major reworking of this transform. The old transform code
was getting unwieldy, with part of the complication coming from the
handling of multiple return statements. By generating a wrapper
function instead, we can avoid a lot of this complexity.

The original entry point function is stripped of all shader IO
attributes (as well as `stage` and `workgroup_size`), but the body is
left unmodified. A new entry point wrapper function is introduced
which calls the original function, packing/unpacking the shader inputs
as necessary, and propagates the result to the corresponding shader
outputs.

The new code has been refactored to use a state object with the
different parts of the transform split into separate functions, which
makes it much more manageable.

Fixed: tint:1076
Bug: tint:920
Change-Id: I3490a0ea7a3509a4e198ce730e476516649d8d96
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60521
Auto-Submit: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
2021-08-04 22:15:28 +00:00

51 lines
1.0 KiB
HLSL

struct BST {
int data;
int leftIndex;
int rightIndex;
};
static float4 x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
void makeTreeNode_struct_BST_i1_i1_i11_(inout BST tree) {
tree.rightIndex = 1;
return;
}
void main_1() {
BST tree_1[10] = (BST[10])0;
BST param = (BST)0;
param = tree_1[0u];
makeTreeNode_struct_BST_i1_i1_i11_(param);
const BST x_40 = param;
BST x_42_1[10] = tree_1;
x_42_1[0u] = x_40;
tree_1 = x_42_1;
if ((tree_1[0u].rightIndex == 0)) {
while (true) {
}
return;
}
x_GLF_color = float4(float(tree_1[0u].rightIndex), 0.0f, 0.0f, 1.0f);
return;
}
struct main_out {
float4 x_GLF_color_1;
};
struct tint_symbol {
float4 x_GLF_color_1 : SV_Target0;
};
main_out main_inner() {
main_1();
const main_out tint_symbol_1 = {x_GLF_color};
return tint_symbol_1;
}
tint_symbol main() {
const main_out inner_result = main_inner();
tint_symbol wrapper_result = (tint_symbol)0;
wrapper_result.x_GLF_color_1 = inner_result.x_GLF_color_1;
return wrapper_result;
}