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>
22 lines
707 B
LLVM
22 lines
707 B
LLVM
; All OpVariable instructions in a function must be the first instructions in the first block
|
|
|
|
; RUN: llc -O0 -mtriple=spirv32-unknown-linux %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV
|
|
; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-linux %s -o - -filetype=obj | spirv-val %}
|
|
|
|
; CHECK-SPIRV: OpFunction
|
|
; CHECK-SPIRV-NEXT: OpLabel
|
|
; CHECK-SPIRV-NEXT: OpVariable
|
|
; CHECK-SPIRV-NEXT: OpVariable
|
|
; CHECK-SPIRV: OpReturn
|
|
; CHECK-SPIRV: OpFunctionEnd
|
|
|
|
define void @main() {
|
|
entry:
|
|
%0 = alloca <2 x i32>, align 4
|
|
store <2 x i32> zeroinitializer, ptr %0, align 4
|
|
%1 = getelementptr <2 x i32>, ptr %0, i32 0, i32 0
|
|
%2 = alloca float, align 4
|
|
store float 0.0, ptr %2, align 4
|
|
ret void
|
|
}
|