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>
36 lines
1.5 KiB
LLVM
36 lines
1.5 KiB
LLVM
; RUN: llc -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s --check-prefixes=CHECK-SPIRV
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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-SPIRV-DAG: %[[#Char:]] = OpTypeInt 8 0
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; CHECK-SPIRV-DAG: %[[#GlobalCharPtr:]] = OpTypePointer CrossWorkgroup %[[#Char]]
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; CHECK-SPIRV-DAG: %[[#LocalCharPtr:]] = OpTypePointer Workgroup %[[#Char]]
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; CHECK-SPIRV-DAG: %[[#GenericCharPtr:]] = OpTypePointer Generic %[[#Char]]
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; CHECK-SPIRV: OpFunction
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; CHECK-SPIRV: %[[#Arg1:]] = OpFunctionParameter %[[#GlobalCharPtr]]
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; CHECK-SPIRV: %[[#Ptr1:]] = OpPtrCastToGeneric %[[#GenericCharPtr]] %[[#Arg1]]
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; CHECK-SPIRV: OpGenericCastToPtr %[[#LocalCharPtr]] %[[#Ptr1]]
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; CHECK-SPIRV: OpFunctionEnd
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; CHECK-SPIRV: OpFunction
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; CHECK-SPIRV: %[[#Arg2:]] = OpFunctionParameter %[[#GlobalCharPtr]]
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; CHECK-SPIRV: %[[#Ptr2:]] = OpPtrCastToGeneric %[[#GenericCharPtr]] %[[#Arg2]]
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; CHECK-SPIRV: OpGenericCastToPtr %[[#LocalCharPtr]] %[[#Ptr2]]
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; CHECK-SPIRV: OpFunctionEnd
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@G_p = global ptr addrspace(3) null
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@G_p2 = global ptr addrspace(3) null
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define spir_kernel void @foo(ptr addrspace(1) %arg) {
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entry:
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%p = addrspacecast ptr addrspace(1) %arg to ptr addrspace(3)
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store ptr addrspace(3) %p, ptr @G_p
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ret void
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}
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define spir_kernel void @bar(ptr addrspace(1) %arg) {
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entry:
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%p1 = addrspacecast ptr addrspace(1) %arg to ptr addrspace(4)
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%p2 = addrspacecast ptr addrspace(4) %p1 to ptr addrspace(3)
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store ptr addrspace(3) %p2, ptr @G_p2
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ret void
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}
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