[spirv-writer] Use const for function parameters

The backend was wrongly generating OpLoad instructions for function parameter
accesses since it thought they were pointers.

Run SPIR-V validation for the entry point IO tests.

Bug: tint:509
Change-Id: Ic816a22973fb87c7ede26bad8fb595764a333250
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/45941
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: James Price <jrprice@google.com>
This commit is contained in:
James Price 2021-03-25 20:49:37 +00:00 committed by Commit Bot service account
parent ea855a9144
commit a696b027b3
3 changed files with 81 additions and 99 deletions

View File

@ -156,8 +156,7 @@ void Spirv::HandleEntryPointIOTypes(CloneContext& ctx) const {
// Create a function that writes a return value to all output variables.
auto* store_value =
ctx.dst->Var(store_value_symbol, ctx.Clone(func->return_type()),
ast::StorageClass::kFunction, nullptr);
ctx.dst->Const(store_value_symbol, ctx.Clone(func->return_type()));
auto return_func_symbol = ctx.dst->Symbols().New();
auto* return_func = ctx.dst->create<ast::Function>(
return_func_symbol, ast::VariableList{store_value},
@ -268,11 +267,8 @@ Symbol Spirv::HoistToInputVariables(
}
// Create a function-scope variable for the struct.
// TODO(jrprice): Use Const when crbug.com/tint/662 is fixed
auto* initializer = ctx.dst->Construct(ctx.Clone(ty), init_values);
auto* func_var =
ctx.dst->Var(func_var_symbol, ctx.Clone(ty), ast::StorageClass::kFunction,
initializer, ast::DecorationList{});
auto* func_var = ctx.dst->Const(func_var_symbol, ctx.Clone(ty), initializer);
ctx.InsertBefore(*func->body()->begin(), ctx.dst->WrapInStatement(func_var));
return func_var_symbol;
}

View File

@ -214,7 +214,7 @@ struct FragmentInput {
[[stage(fragment)]]
fn frag_main() -> void {
var tint_symbol_6 : FragmentInput = FragmentInput(tint_symbol_4, tint_symbol_5);
const tint_symbol_6 : FragmentInput = FragmentInput(tint_symbol_4, tint_symbol_5);
var col : f32 = (tint_symbol_6.coord.x * tint_symbol_6.value);
}
)";
@ -282,10 +282,10 @@ struct FragmentInput {
[[stage(fragment)]]
fn frag_main() -> void {
var tint_symbol_13 : Builtins = Builtins(tint_symbol_12);
var tint_symbol_16 : Locations = Locations(tint_symbol_14, tint_symbol_15);
var tint_symbol_17 : Other = Other(tint_symbol_16);
var tint_symbol_19 : FragmentInput = FragmentInput(tint_symbol_13, tint_symbol_17, tint_symbol_18);
const tint_symbol_13 : Builtins = Builtins(tint_symbol_12);
const tint_symbol_16 : Locations = Locations(tint_symbol_14, tint_symbol_15);
const tint_symbol_17 : Other = Other(tint_symbol_16);
const tint_symbol_19 : FragmentInput = FragmentInput(tint_symbol_13, tint_symbol_17, tint_symbol_18);
var col : f32 = (tint_symbol_19.b.coord.x * tint_symbol_19.value);
var l : f32 = (tint_symbol_19.o.l.l2 + tint_symbol_19.o.l.l3);
}
@ -499,7 +499,7 @@ fn tint_symbol_7(tint_symbol_5 : Interface) -> void {
[[stage(vertex)]]
fn vert_main() -> void {
var tint_symbol_4 : Interface = Interface(tint_symbol_3);
const tint_symbol_4 : Interface = Interface(tint_symbol_3);
tint_symbol_7(tint_symbol_4);
return;
}
@ -548,7 +548,7 @@ fn vert_main() -> void {
[[stage(fragment)]]
fn frag_main() -> void {
var tint_symbol_8 : Interface = Interface(tint_symbol_7);
const tint_symbol_8 : Interface = Interface(tint_symbol_7);
var x : f32 = tint_symbol_8.value;
}
)";
@ -621,8 +621,8 @@ fn vert_main() -> void {
[[stage(fragment)]]
fn frag_main() -> void {
var tint_symbol_15 : Interface = Interface(tint_symbol_14);
var tint_symbol_16 : FragmentInput = FragmentInput(tint_symbol_13, tint_symbol_15);
const tint_symbol_15 : Interface = Interface(tint_symbol_14);
const tint_symbol_16 : FragmentInput = FragmentInput(tint_symbol_13, tint_symbol_15);
var x : f32 = tint_symbol_16.interface.value;
}
)";
@ -690,8 +690,8 @@ fn tint_symbol_17(tint_symbol_13 : MyVertexOutput) -> void {
[[stage(vertex)]]
fn vert_main() -> void {
var tint_symbol_9 : MyLocation = MyLocation(tint_symbol_8);
var tint_symbol_11 : MyVertexInput = MyVertexInput(tint_symbol_9, tint_symbol_10);
const tint_symbol_9 : MyLocation = MyLocation(tint_symbol_8);
const tint_symbol_11 : MyVertexInput = MyVertexInput(tint_symbol_9, tint_symbol_10);
tint_symbol_17(tint_symbol_11);
return;
}
@ -746,7 +746,7 @@ fn tint_symbol_10(tint_symbol_8 : FragmentOutput) -> void {
[[stage(fragment)]]
fn frag_main() -> void {
var tint_symbol_7 : FragmentInput = FragmentInput(tint_symbol_5, tint_symbol_6);
const tint_symbol_7 : FragmentInput = FragmentInput(tint_symbol_5, tint_symbol_6);
tint_symbol_10(FragmentOutput((tint_symbol_7.coord.x * tint_symbol_7.value)));
return;
}

View File

@ -95,6 +95,8 @@ OpStore %17 %16
OpReturn
OpFunctionEnd
)");
Validate(b);
}
TEST_F(BuilderTest, EntryPoint_ReturnValue) {
@ -129,13 +131,13 @@ TEST_F(BuilderTest, EntryPoint_ReturnValue) {
// Output storage class, and the return statements are replaced with stores.
EXPECT_EQ(DumpBuilder(b), R"(OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %15 "frag_main" %1 %4
OpExecutionMode %15 OriginUpperLeft
OpEntryPoint Fragment %14 "frag_main" %1 %4
OpExecutionMode %14 OriginUpperLeft
OpName %1 "tint_symbol_1"
OpName %4 "tint_symbol_3"
OpName %10 "tint_symbol_4"
OpName %11 "tint_symbol_2"
OpName %15 "frag_main"
OpName %14 "frag_main"
OpDecorate %1 Location 0
OpDecorate %4 Location 0
%3 = OpTypeInt 32 0
@ -147,32 +149,33 @@ OpDecorate %4 Location 0
%4 = OpVariable %5 Output %7
%9 = OpTypeVoid
%8 = OpTypeFunction %9 %6
%14 = OpTypeFunction %9
%18 = OpConstant %3 10
%20 = OpTypeBool
%24 = OpConstant %6 0.5
%26 = OpConstant %6 1
%13 = OpTypeFunction %9
%17 = OpConstant %3 10
%19 = OpTypeBool
%23 = OpConstant %6 0.5
%25 = OpConstant %6 1
%10 = OpFunction %9 None %8
%11 = OpFunctionParameter %6
%12 = OpLabel
%13 = OpLoad %6 %11
OpStore %4 %13
OpStore %4 %11
OpReturn
OpFunctionEnd
%15 = OpFunction %9 None %14
%16 = OpLabel
%17 = OpLoad %3 %1
%19 = OpUGreaterThan %20 %17 %18
OpSelectionMerge %21 None
OpBranchConditional %19 %22 %21
%22 = OpLabel
%23 = OpFunctionCall %9 %10 %24
OpReturn
%14 = OpFunction %9 None %13
%15 = OpLabel
%16 = OpLoad %3 %1
%18 = OpUGreaterThan %19 %16 %17
OpSelectionMerge %20 None
OpBranchConditional %18 %21 %20
%21 = OpLabel
%25 = OpFunctionCall %9 %10 %26
%22 = OpFunctionCall %9 %10 %23
OpReturn
%20 = OpLabel
%24 = OpFunctionCall %9 %10 %25
OpReturn
OpFunctionEnd
)");
Validate(b);
}
TEST_F(BuilderTest, EntryPoint_SharedSubStruct) {
@ -250,10 +253,10 @@ TEST_F(BuilderTest, EntryPoint_SharedSubStruct) {
EXPECT_EQ(DumpBuilder(b), R"(OpCapability Shader
OpMemoryModel Logical GLSL450
OpEntryPoint Vertex %30 "vert_main" %1 %6
OpEntryPoint Fragment %41 "frag_main" %11 %9 %12
OpExecutionMode %41 OriginUpperLeft
OpExecutionMode %41 DepthReplacing
OpEntryPoint Vertex %24 "vert_main" %1 %6
OpEntryPoint Fragment %34 "frag_main" %11 %9 %12
OpExecutionMode %34 OriginUpperLeft
OpExecutionMode %34 DepthReplacing
OpName %1 "tint_symbol_9"
OpName %6 "tint_symbol_10"
OpName %9 "tint_symbol_13"
@ -266,15 +269,13 @@ OpName %16 "Interface"
OpMemberName %16 0 "value"
OpName %17 "tint_symbol_11"
OpName %18 "tint_symbol_8"
OpName %30 "vert_main"
OpName %37 "tint_symbol_19"
OpName %38 "tint_symbol_17"
OpName %41 "frag_main"
OpName %45 "tint_symbol_15"
OpName %48 "FragmentInput"
OpMemberName %48 0 "mul"
OpMemberName %48 1 "interface"
OpName %52 "tint_symbol_16"
OpName %24 "vert_main"
OpName %31 "tint_symbol_19"
OpName %32 "tint_symbol_17"
OpName %34 "frag_main"
OpName %38 "FragmentInput"
OpMemberName %38 0 "mul"
OpMemberName %38 1 "interface"
OpDecorate %1 BuiltIn Position
OpDecorate %6 Location 1
OpDecorate %9 Location 0
@ -283,8 +284,8 @@ OpDecorate %12 BuiltIn FragDepth
OpMemberDecorate %15 0 Offset 0
OpMemberDecorate %15 1 Offset 16
OpMemberDecorate %16 0 Offset 0
OpMemberDecorate %48 0 Offset 0
OpMemberDecorate %48 1 Offset 4
OpMemberDecorate %38 0 Offset 0
OpMemberDecorate %38 1 Offset 4
%4 = OpTypeFloat 32
%3 = OpTypeVector %4 4
%2 = OpTypePointer Output %3
@ -301,64 +302,49 @@ OpMemberDecorate %48 1 Offset 4
%16 = OpTypeStruct %4
%15 = OpTypeStruct %3 %16
%13 = OpTypeFunction %14 %15
%20 = OpTypeInt 32 0
%21 = OpConstant %20 0
%22 = OpTypePointer Function %3
%25 = OpConstant %20 1
%26 = OpTypePointer Function %4
%29 = OpTypeFunction %14
%33 = OpConstant %4 42
%34 = OpConstantComposite %16 %33
%35 = OpConstantComposite %15 %5 %34
%36 = OpTypeFunction %14 %4
%46 = OpTypePointer Function %16
%47 = OpConstantNull %16
%48 = OpTypeStruct %4 %16
%53 = OpTypePointer Function %48
%54 = OpConstantNull %48
%23 = OpTypeFunction %14
%27 = OpConstant %4 42
%28 = OpConstantComposite %16 %27
%29 = OpConstantComposite %15 %5 %28
%30 = OpTypeFunction %14 %4
%38 = OpTypeStruct %4 %16
%17 = OpFunction %14 None %13
%18 = OpFunctionParameter %15
%19 = OpLabel
%23 = OpAccessChain %22 %18 %21
%24 = OpLoad %3 %23
OpStore %1 %24
%27 = OpAccessChain %26 %18 %25 %21
%28 = OpLoad %4 %27
OpStore %6 %28
%20 = OpCompositeExtract %3 %18 0
OpStore %1 %20
%21 = OpCompositeExtract %16 %18 1
%22 = OpCompositeExtract %4 %21 0
OpStore %6 %22
OpReturn
OpFunctionEnd
%30 = OpFunction %14 None %29
%31 = OpLabel
%32 = OpFunctionCall %14 %17 %35
%24 = OpFunction %14 None %23
%25 = OpLabel
%26 = OpFunctionCall %14 %17 %29
OpReturn
OpFunctionEnd
%37 = OpFunction %14 None %36
%38 = OpFunctionParameter %4
%39 = OpLabel
%40 = OpLoad %4 %38
OpStore %12 %40
%31 = OpFunction %14 None %30
%32 = OpFunctionParameter %4
%33 = OpLabel
OpStore %12 %32
OpReturn
OpFunctionEnd
%41 = OpFunction %14 None %29
%42 = OpLabel
%45 = OpVariable %46 Function %47
%52 = OpVariable %53 Function %54
%43 = OpLoad %4 %11
%44 = OpCompositeConstruct %16 %43
OpStore %45 %44
%49 = OpLoad %4 %9
%50 = OpLoad %16 %45
%51 = OpCompositeConstruct %48 %49 %50
OpStore %52 %51
%56 = OpAccessChain %26 %52 %21
%57 = OpLoad %4 %56
%58 = OpAccessChain %26 %52 %25 %21
%59 = OpLoad %4 %58
%60 = OpFMul %4 %57 %59
%55 = OpFunctionCall %14 %37 %60
%34 = OpFunction %14 None %23
%35 = OpLabel
%36 = OpLoad %4 %11
%37 = OpCompositeConstruct %16 %36
%39 = OpLoad %4 %9
%40 = OpCompositeConstruct %38 %39 %37
%42 = OpCompositeExtract %4 %40 0
%43 = OpCompositeExtract %16 %40 1
%44 = OpCompositeExtract %4 %43 0
%45 = OpFMul %4 %42 %44
%41 = OpFunctionCall %14 %31 %45
OpReturn
OpFunctionEnd
)");
Validate(b);
}
} // namespace