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>
28 lines
1.4 KiB
LLVM
28 lines
1.4 KiB
LLVM
; 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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; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s
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; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %}
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; CHECK-DAG: %[[#LongTy:]] = OpTypeInt 64 0
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; CHECK-DAG: %[[#EventTy:]] = OpTypeEvent
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; CHECK-DAG: %[[#LongNull:]] = OpConstantNull %[[#LongTy]]
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; CHECK-DAG: %[[#EventNull:]] = OpConstantNull %[[#EventTy]]
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; CHECK: OpFunction
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; CHECK: OpINotEqual %[[#]] %[[#]] %[[#LongNull]]
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; CHECK: OpGroupAsyncCopy %[[#EventTy]] %[[#]] %[[#]] %[[#]] %[[#]] %[[#]] %[[#EventNull]]
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@G_r1 = global i1 0
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@G_e1 = global target("spirv.Event") poison
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define weak_odr dso_local spir_kernel void @foo(i64 %_arg_i, ptr addrspace(1) %_arg_ptr, ptr addrspace(3) %_arg_local) {
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entry:
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%r1 = icmp ne i64 %_arg_i, 0
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store i1 %r1, ptr @G_r1
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%e1 = tail call spir_func target("spirv.Event") @__spirv_GroupAsyncCopy(i32 2, ptr addrspace(3) %_arg_local, ptr addrspace(1) %_arg_ptr, i64 1, i64 1, target("spirv.Event") zeroinitializer)
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store target("spirv.Event") %e1, ptr @G_e1
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ret void
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}
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declare dso_local spir_func target("spirv.Event") @__spirv_GroupAsyncCopy(i32, ptr addrspace(3), ptr addrspace(1), i64, i64, target("spirv.Event"))
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