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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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33
test/tint/expressions/binary/div/vec3-vec3/u32.wgsl.expected.spvasm
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@@ -1,27 +1,44 @@
; SPIR-V
; Version: 1.3
; Generator: Google Tint Compiler; 0
; Bound: 16
; Bound: 28
; Schema: 0
OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint GLCompute %f "f"
OpExecutionMode %f LocalSize 1 1 1
OpName %tint_div "tint_div"
OpName %lhs "lhs"
OpName %rhs "rhs"
OpName %f "f"
%void = OpTypeVoid
%1 = OpTypeFunction %void
%uint = OpTypeInt 32 0
%v3uint = OpTypeVector %uint 3
%1 = OpTypeFunction %v3uint %v3uint %v3uint
%9 = OpConstantNull %v3uint
%bool = OpTypeBool
%v3bool = OpTypeVector %bool 3
%uint_1 = OpConstant %uint 1
%14 = OpConstantComposite %v3uint %uint_1 %uint_1 %uint_1
%void = OpTypeVoid
%16 = OpTypeFunction %void
%uint_2 = OpConstant %uint 2
%uint_3 = OpConstant %uint 3
%10 = OpConstantComposite %v3uint %uint_1 %uint_2 %uint_3
%22 = OpConstantComposite %v3uint %uint_1 %uint_2 %uint_3
%uint_4 = OpConstant %uint 4
%uint_5 = OpConstant %uint 5
%uint_6 = OpConstant %uint 6
%14 = OpConstantComposite %v3uint %uint_4 %uint_5 %uint_6
%f = OpFunction %void None %1
%4 = OpLabel
%15 = OpUDiv %v3uint %10 %14
%26 = OpConstantComposite %v3uint %uint_4 %uint_5 %uint_6
%tint_div = OpFunction %v3uint None %1
%lhs = OpFunctionParameter %v3uint
%rhs = OpFunctionParameter %v3uint
%7 = OpLabel
%10 = OpIEqual %v3bool %rhs %9
%8 = OpSelect %v3uint %10 %14 %rhs
%15 = OpUDiv %v3uint %lhs %8
OpReturnValue %15
OpFunctionEnd
%f = OpFunction %void None %16
%19 = OpLabel
%27 = OpFunctionCall %v3uint %tint_div %22 %26
OpReturn
OpFunctionEnd