mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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166 lines
3.9 KiB
C++
166 lines
3.9 KiB
C++
// Copyright (c) 2018 Google LLC.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string>
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#include <gmock/gmock.h>
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#include "../pass_fixture.h"
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#include "opt/licm_pass.h"
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namespace spvtools {
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namespace opt {
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namespace {
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using namespace spvtools;
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using ::testing::UnorderedElementsAre;
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using PassClassTest = PassTest<::testing::Test>;
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/*
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Tests that the LICM pass will detect an move an invariant from a nested loop,
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but not it's parent loop
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Generated from the following GLSL fragment shader
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--eliminate-local-multi-store has also been run on the spv binary
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#version 440 core
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void main(){
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int a = 2;
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int hoist = 0;
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for (int i = 0; i < 10; i++) {
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for (int j = 0; j < 10; j++) {
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// hoist 'hoist = a - i' out of j loop, but not i loop
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hoist = a - i;
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}
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}
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}
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*/
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TEST_F(PassClassTest, NestedSingleHoist) {
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const std::string before_hoist = R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main"
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 440
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OpName %main "main"
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%void = OpTypeVoid
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%4 = OpTypeFunction %void
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%int = OpTypeInt 32 1
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%_ptr_Function_int = OpTypePointer Function %int
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%int_2 = OpConstant %int 2
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%int_0 = OpConstant %int 0
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%int_10 = OpConstant %int 10
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%bool = OpTypeBool
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%int_1 = OpConstant %int 1
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%12 = OpUndef %int
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%main = OpFunction %void None %4
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%13 = OpLabel
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OpBranch %14
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%14 = OpLabel
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%15 = OpPhi %int %int_0 %13 %16 %17
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%18 = OpPhi %int %int_0 %13 %19 %17
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%20 = OpPhi %int %12 %13 %21 %17
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OpLoopMerge %22 %17 None
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OpBranch %23
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%23 = OpLabel
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%24 = OpSLessThan %bool %18 %int_10
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OpBranchConditional %24 %25 %22
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%25 = OpLabel
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OpBranch %26
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%26 = OpLabel
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%16 = OpPhi %int %15 %25 %27 %28
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%21 = OpPhi %int %int_0 %25 %29 %28
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OpLoopMerge %30 %28 None
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OpBranch %31
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%31 = OpLabel
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%32 = OpSLessThan %bool %21 %int_10
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OpBranchConditional %32 %33 %30
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%33 = OpLabel
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%27 = OpISub %int %int_2 %18
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OpBranch %28
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%28 = OpLabel
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%29 = OpIAdd %int %21 %int_1
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OpBranch %26
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%30 = OpLabel
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OpBranch %17
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%17 = OpLabel
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%19 = OpIAdd %int %18 %int_1
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OpBranch %14
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%22 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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const std::string after_hoist = R"(OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main"
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OpExecutionMode %main OriginUpperLeft
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OpSource GLSL 440
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OpName %main "main"
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%void = OpTypeVoid
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%4 = OpTypeFunction %void
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%int = OpTypeInt 32 1
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%_ptr_Function_int = OpTypePointer Function %int
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%int_2 = OpConstant %int 2
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%int_0 = OpConstant %int 0
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%int_10 = OpConstant %int 10
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%bool = OpTypeBool
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%int_1 = OpConstant %int 1
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%12 = OpUndef %int
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%main = OpFunction %void None %4
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%13 = OpLabel
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OpBranch %14
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%14 = OpLabel
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%15 = OpPhi %int %int_0 %13 %16 %17
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%18 = OpPhi %int %int_0 %13 %19 %17
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%20 = OpPhi %int %12 %13 %21 %17
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OpLoopMerge %22 %17 None
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OpBranch %23
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%23 = OpLabel
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%24 = OpSLessThan %bool %18 %int_10
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OpBranchConditional %24 %25 %22
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%25 = OpLabel
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%27 = OpISub %int %int_2 %18
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OpBranch %26
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%26 = OpLabel
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%16 = OpPhi %int %15 %25 %27 %28
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%21 = OpPhi %int %int_0 %25 %29 %28
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OpLoopMerge %30 %28 None
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OpBranch %31
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%31 = OpLabel
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%32 = OpSLessThan %bool %21 %int_10
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OpBranchConditional %32 %33 %30
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%33 = OpLabel
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OpBranch %28
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%28 = OpLabel
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%29 = OpIAdd %int %21 %int_1
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OpBranch %26
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%30 = OpLabel
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OpBranch %17
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%17 = OpLabel
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%19 = OpIAdd %int %18 %int_1
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OpBranch %14
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%22 = OpLabel
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OpReturn
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OpFunctionEnd
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)";
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SinglePassRunAndCheck<LICMPass>(before_hoist, after_hoist, true);
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}
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} // namespace
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} // namespace opt
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} // namespace spvtools
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