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>
46 lines
2.0 KiB
LLVM
46 lines
2.0 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: %[[#TYCHAR:]] = OpTypeInt 8 0
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; CHECK-DAG: %[[#TYCHARPTR:]] = OpTypePointer Function %[[#TYCHAR]]
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; CHECK-DAG: %[[#TYINT32:]] = OpTypeInt 32 0
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; CHECK-DAG: %[[#TYSTRUCTINT32:]] = OpTypeStruct %[[#TYINT32]]
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; CHECK-DAG: %[[#TYARRAY:]] = OpTypeArray %[[#TYSTRUCTINT32]] %[[#]]
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; CHECK-DAG: %[[#TYSTRUCT:]] = OpTypeStruct %[[#TYARRAY]]
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; CHECK-DAG: %[[#TYSTRUCTPTR:]] = OpTypePointer Function %[[#TYSTRUCT]]
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; CHECK-DAG: %[[#TYINT64:]] = OpTypeInt 64 0
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; CHECK-DAG: %[[#TYINT64PTR:]] = OpTypePointer Function %[[#TYINT64]]
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; CHECK: OpFunction
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; CHECK: %[[#PTRTOSTRUCT:]] = OpFunctionParameter %[[#TYSTRUCTPTR]]
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; CHECK: %[[#PTRTOCHAR:]] = OpBitcast %[[#TYCHARPTR]] %[[#PTRTOSTRUCT]]
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; CHECK-NEXT: OpInBoundsPtrAccessChain %[[#TYCHARPTR]] %[[#PTRTOCHAR]]
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; CHECK: OpFunction
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; CHECK: %[[#PTRTOSTRUCT2:]] = OpFunctionParameter %[[#TYSTRUCTPTR]]
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; CHECK: %[[#ELEM:]] = OpInBoundsPtrAccessChain %[[#TYSTRUCTPTR]] %[[#PTRTOSTRUCT2]]
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; CHECK-NEXT: %[[#TOLOAD:]] = OpBitcast %[[#TYINT64PTR]] %[[#ELEM]]
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; CHECK-NEXT: OpLoad %[[#TYINT64]] %[[#TOLOAD]]
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%struct.S = type { i32 }
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%struct.__wrapper_class = type { [7 x %struct.S] }
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@G_elem = global ptr null
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@G_data = global i64 0
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define spir_kernel void @foo1(ptr noundef byval(%struct.__wrapper_class) align 4 %_arg_Arr) {
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entry:
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%elem = getelementptr inbounds i8, ptr %_arg_Arr, i64 0
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store ptr %elem, ptr @G_elem
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ret void
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}
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define spir_kernel void @foo2(ptr noundef byval(%struct.__wrapper_class) align 4 %_arg_Arr) {
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entry:
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%elem = getelementptr inbounds %struct.__wrapper_class, ptr %_arg_Arr, i64 0
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%data = load i64, ptr %elem
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store i64 %data, ptr @G_data
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ret void
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}
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