35dfeb7b4d
The instruction selection pass for SPIR-V now performs dead code elimination (DCE). This change removes unused instructions, leading to more optimized SPIR-V output. As a consequence of this, several tests were updated to ensure their continued correctness and to prevent previously tested code from being optimized away. Specifically: - Many tests now store computed values into global variables to ensure they are not eliminated by DCE, allowing their code generation to be verified. - The test `keep-tracked-const.ll` was removed because it no longer tested its original intent. The check statements in this test were for constants generated when expanding a G_TRUNC instruction, which is now removed by DCE instead of being expanded. - A new test, `remove-dead-type-intrinsics.ll`, was added to confirm that dead struct types are correctly removed by the compiler. These updates improve the SPIR-V backends optimization capabilities and maintain the robustness of the test suite. --------- Co-authored-by: Nathan Gauër <github@keenuts.net>
29 lines
1.2 KiB
LLVM
29 lines
1.2 KiB
LLVM
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; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
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; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown %s -o - -filetype=obj | spirv-val %}
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; CHECK-DAG: %[[#INT8:]] = OpTypeInt 8 0
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; CHECK-DAG: %[[#INT64:]] = OpTypeInt 64 0
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; CHECK-DAG: %[[#PTRINT8:]] = OpTypePointer Workgroup %[[#INT8]]
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; CHECK-DAG: %[[#CONST:]] = OpConstant %[[#INT64]] 1
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@G_gep1 = global ptr addrspace(3) null
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@G_gep2 = global ptr addrspace(3) null
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; CHECK: %[[#PARAM1:]] = OpFunctionParameter %[[#PTRINT8]]
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define spir_kernel void @test1(ptr addrspace(3) %address) {
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; CHECK: %[[#]] = OpInBoundsPtrAccessChain %[[#PTRINT8]] %[[#PARAM1]] %[[#CONST]]
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%cast = bitcast ptr addrspace(3) %address to ptr addrspace(3)
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%gep = getelementptr inbounds i8, ptr addrspace(3) %cast, i64 1
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store ptr addrspace(3) %gep, ptr @G_gep1
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ret void
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}
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; CHECK: %[[#PARAM2:]] = OpFunctionParameter %[[#PTRINT8]]
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define spir_kernel void @test2(ptr addrspace(3) %address) {
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; CHECK: %[[#]] = OpInBoundsPtrAccessChain %[[#PTRINT8]] %[[#PARAM2]] %[[#CONST]]
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%gep = getelementptr inbounds i8, ptr addrspace(3) %address, i64 1
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store ptr addrspace(3) %gep, ptr @G_gep2
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ret void
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}
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