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

88 lines
1.7 KiB
HLSL

struct S {
int arr[2];
};
cbuffer cbuffer_x_9 : register(b0, space0) {
uint4 x_9[1];
};
static float4 x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
int func_struct_S_i1_2_1_i1_(inout S s, inout int x) {
const int x_16 = x;
s.arr[1] = (x_16 + 1);
const int x_18 = asint(x_9[0].x);
const int x_19 = s.arr[x_18];
const int x_20 = x;
if ((x_19 == x_20)) {
return -1;
}
const int x_21 = x;
return x_21;
}
void main_1() {
int a = 0;
int i = 0;
int j = 0;
S s_1 = (S)0;
S param = (S)0;
int param_1 = 0;
a = 0;
i = 0;
while (true) {
const int x_22 = i;
const int x_23 = asint(x_9[0].x);
if ((x_22 < (2 + x_23))) {
} else {
break;
}
j = 0;
while (true) {
const int x_25 = j;
const int x_26 = asint(x_9[0].x);
if ((x_25 < (3 + x_26))) {
} else {
break;
}
const int x_28 = i;
const int x_29 = j;
param = s_1;
param_1 = (x_28 + x_29);
const int x_31 = func_struct_S_i1_2_1_i1_(param, param_1);
a = (a + x_31);
{
j = (j + 1);
}
}
{
i = (i + 1);
}
}
if ((a == 30)) {
x_GLF_color = float4(1.0f, 0.0f, 0.0f, 1.0f);
} else {
x_GLF_color = float4(0.0f, 0.0f, 0.0f, 0.0f);
}
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_2 = {x_GLF_color};
return tint_symbol_2;
}
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;
}