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>
44 lines
1.2 KiB
LLVM
44 lines
1.2 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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; CHECK-LABEL: Begin function original_testcase
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define fastcc void @original_testcase() {
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top:
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%0 = alloca [1 x ptr], align 4
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; CHECK: OpCompositeInsert
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%1 = insertvalue [1 x ptr] zeroinitializer, ptr poison, 0
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store [1 x ptr] %1, ptr %0
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ret void
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}
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; CHECK-LABEL: Begin function additional_testcases
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define fastcc void @additional_testcases() {
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top:
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%0 = alloca [2 x ptr], align 4
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; Test with different pointer types
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; CHECK: OpCompositeInsert
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%1 = insertvalue [1 x ptr] zeroinitializer, ptr undef, 0
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; CHECK: OpStore
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store [1 x ptr] %1, ptr %0
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; CHECK-NEXT: OpCompositeInsert
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%2 = insertvalue {ptr, i32} zeroinitializer, ptr poison, 0
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; CHECK: OpStore
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store {ptr, i32} %2, ptr %0
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; CHECK-NEXT: OpCompositeInsert
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%3 = insertvalue {ptr, ptr} undef, ptr null, 0
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; CHECK: OpStore
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store {ptr, ptr} %3, ptr %0
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; Test with undef aggregate
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; CHECK-NEXT: OpCompositeInsert
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%4 = insertvalue [1 x ptr] undef, ptr undef, 0
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; CHECK: OpStore
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store [1 x ptr] %4, ptr %0
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ret void
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}
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