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>
110 lines
3.5 KiB
LLVM
110 lines
3.5 KiB
LLVM
; RUN: llc -O0 -mtriple=spirv-unknown-vulkan1.3-compute %s -o - | FileCheck %s
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; CHECK-DAG: [[uint:%[0-9]+]] = OpTypeInt 32 0
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%A = type {
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i32,
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i32
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}
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; CHECK-DAG: [[A:%[0-9]+]] = OpTypeStruct [[uint]] [[uint]]
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%B = type {
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%A,
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i32,
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%A
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}
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; CHECK-DAG: [[B:%[0-9]+]] = OpTypeStruct [[A]] [[uint]] [[A]]
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; CHECK-DAG: [[uint_0:%[0-9]+]] = OpConstant [[uint]] 0
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; CHECK-DAG: [[uint_1:%[0-9]+]] = OpConstant [[uint]] 1
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; CHECK-DAG: [[uint_2:%[0-9]+]] = OpConstant [[uint]] 2
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; CHECK-DAG: [[ptr_uint:%[0-9]+]] = OpTypePointer Function [[uint]]
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; CHECK-DAG: [[ptr_A:%[0-9]+]] = OpTypePointer Function [[A]]
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; CHECK-DAG: [[ptr_B:%[0-9]+]] = OpTypePointer Function [[B]]
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define internal ptr @gep_B_0(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpAccessChain [[ptr_A]] [[tmp]] [[uint_0]]
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%res = getelementptr %B, ptr %base, i32 0, i32 0
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ret ptr %res
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}
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define internal ptr @gep_inbounds_B_0(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpInBoundsAccessChain [[ptr_A]] [[tmp]] [[uint_0]]
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%res = getelementptr inbounds %B, ptr %base, i32 0, i32 0
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ret ptr %res
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}
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define internal ptr @gep_B_1(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpAccessChain [[ptr_uint]] [[tmp]] [[uint_1]]
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%res = getelementptr %B, ptr %base, i32 0, i32 1
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ret ptr %res
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}
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define internal ptr @gep_inbounds_B_1(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpInBoundsAccessChain [[ptr_uint]] [[tmp]] [[uint_1]]
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%res = getelementptr inbounds %B, ptr %base, i32 0, i32 1
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ret ptr %res
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}
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define internal ptr @gep_B_2(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpAccessChain [[ptr_A]] [[tmp]] [[uint_2]]
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%res = getelementptr %B, ptr %base, i32 0, i32 2
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ret ptr %res
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}
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define internal ptr @gep_inbounds_B_2(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpInBoundsAccessChain [[ptr_A]] [[tmp]] [[uint_2]]
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%res = getelementptr inbounds %B, ptr %base, i32 0, i32 2
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ret ptr %res
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}
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define internal ptr @gep_B_2_1(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpAccessChain [[ptr_uint]] [[tmp]] [[uint_2]] [[uint_1]]
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%res = getelementptr %B, ptr %base, i32 0, i32 2, i32 1
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ret ptr %res
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}
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define internal ptr @gep_inbounds_B_2_1(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: {{%[0-9]+}} = OpInBoundsAccessChain [[ptr_uint]] [[tmp]] [[uint_2]] [[uint_1]]
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%res = getelementptr inbounds %B, ptr %base, i32 0, i32 2, i32 1
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ret ptr %res
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}
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define internal ptr @gep_B_2_A_1(ptr %base) {
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; CHECK: [[tmp:%[0-9]+]] = OpFunctionParameter [[ptr_B]]
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; CHECK: [[x:%[0-9]+]] = OpAccessChain [[ptr_A]] [[tmp]] [[uint_2]]
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; CHECK: {{%[0-9]+}} = OpAccessChain [[ptr_uint]] [[x]] [[uint_1]]
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%x = getelementptr %B, ptr %base, i32 0, i32 2
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%res = getelementptr %A, ptr %x, i32 0, i32 1
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ret ptr %res
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}
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define void @main() #1 {
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entry:
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%0 = alloca %B, align 4
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; CHECK: [[tmp:%[0-9]+]] = OpVariable [[ptr_B]] Function
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%1 = call ptr @gep_B_0(ptr %0)
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%2 = call ptr @gep_inbounds_B_0(ptr %0)
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%3 = call ptr @gep_B_1(ptr %0)
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%4 = call ptr @gep_inbounds_B_1(ptr %0)
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%5 = call ptr @gep_B_2(ptr %0)
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%6 = call ptr @gep_inbounds_B_2(ptr %0)
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%7 = call ptr @gep_B_2_1(ptr %0)
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%8 = call ptr @gep_inbounds_B_2_1(ptr %0)
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%10 = call ptr @gep_B_2_A_1(ptr %0)
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ret void
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}
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attributes #1 = { "hlsl.numthreads"="4,8,16" "hlsl.shader"="compute" }
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