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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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7
test/tint/expressions/binary/div/vec3-scalar/u32.wgsl.expected.glsl
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@@ -1,9 +1,14 @@
#version 310 es
uvec3 tint_div(uvec3 lhs, uint rhs) {
uvec3 r = uvec3(rhs);
return (lhs / mix(r, uvec3(1u), equal(r, uvec3(0u))));
}
void f() {
uvec3 a = uvec3(1u, 2u, 3u);
uint b = 4u;
uvec3 r = (a / b);
uvec3 r = tint_div(a, b);
}
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;