derek.holloway
7502bf64a4
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54 lines
1.5 KiB
Plaintext
54 lines
1.5 KiB
Plaintext
// REQUIRES: amdgpu-registered-target
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -x hip %s \
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// RUN: -std=c++11 -O3 -mllvm -amdgpu-internalize-symbols -emit-llvm -o - \
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// RUN: -target-cpu gfx906 | FileCheck %s
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -x hip %s \
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// RUN: -std=c++11 -O3 -mllvm -amdgpu-internalize-symbols -emit-llvm -o - \
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// RUN: -target-cpu gfx906 | FileCheck -check-prefix=NEGCHK %s
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#include "Inputs/cuda.h"
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// AMDGPU internalize unused global variables for whole-program compilation
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// (-fno-gpu-rdc for each TU, or -fgpu-rdc for LTO), which are then
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// eliminated by global DCE. If there are invisible unused address space casts
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// for global variables, these dead users need to be eliminated by global
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// DCE before internalization. This test makes sure unused global variables
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// are eliminated.
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// CHECK-DAG: @v1
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__device__ int v1;
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// CHECK-DAG: @v2
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__constant__ int v2;
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// Check unused device/constant variables are eliminated.
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// NEGCHK-NOT: @_ZL2v3
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constexpr int v3 = 1;
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// Check managed variables are always kept.
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// CHECK-DAG: @v4
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__managed__ int v4;
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// Check used device/constant variables are not eliminated.
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// CHECK-DAG: @u1
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__device__ int u1;
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// CHECK-DAG: @u2
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__constant__ int u2;
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// Check u3 is kept because its address is taken.
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// CHECK-DAG: @_ZL2u3
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constexpr int u3 = 2;
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// Check u4 is not kept because it is not ODR-use.
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// NEGCHK-NOT: @_ZL2u4
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constexpr int u4 = 3;
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__device__ int fun1(const int& x);
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__global__ void kern1(int *x) {
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*x = u1 + u2 + fun1(u3) + u4;
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}
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