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Currently, `__constant__` variables do not get unconditionally marked as `constant` in IR, which seems a bit odd given their definition. This is generally inconsequential for NVPTX/AMDGPU, since said variables get emitted in the constant address space for those BEs. However, it is potentially significant for e.g. HIP-on-SPIR-V cases, as SPIR-V does not allow casts to/from the constant AS (`UniformConstant`), which forces `__constant__` variables to be emitted in the global AS, thus making IR constness meaningful.
137 lines
4.9 KiB
Plaintext
137 lines
4.9 KiB
Plaintext
// REQUIRES: x86-registered-target
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// REQUIRES: amdgpu-registered-target
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o %t.nocuid.dev -x hip %s
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// RUN: cat %t.nocuid.dev | FileCheck -check-prefixes=DEV,INT-DEV %s
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// RUN: %clang_cc1 -triple x86_64-gnu-linux \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o %t.nocuid.host -x hip %s
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// RUN: cat %t.nocuid.host | FileCheck -check-prefixes=HOST,INT-HOST %s
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -cuid=abc \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - -x hip %s > %t.dev
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// RUN: cat %t.dev | FileCheck -check-prefixes=DEV,EXT-DEV %s
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// RUN: %clang_cc1 -triple x86_64-gnu-linux -cuid=abc \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - -x hip %s > %t.host
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// RUN: cat %t.host | FileCheck -check-prefixes=HOST,EXT-HOST %s
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// Check host and device compilations use the same postfixes for static
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// variable names.
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// RUN: cat %t.dev %t.host | FileCheck -check-prefix=POSTFIX %s
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// RUN: cat %t.nocuid.dev %t.nocuid.host | FileCheck -check-prefix=POSTFIX-ID %s
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// Negative tests.
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - -x hip %s | FileCheck \
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// RUN: -check-prefix=DEV-NEG %s
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// RUN: %clang_cc1 -triple x86_64-gnu-linux \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - -x hip %s | FileCheck \
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// RUN: -check-prefix=HOST-NEG %s
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// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -cuid=abc \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - -x hip %s > %t.dev
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// RUN: cat %t.dev | FileCheck -check-prefix=DEV-NEG %s
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// RUN: %clang_cc1 -triple x86_64-gnu-linux -cuid=abc \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - -x hip %s > %t.host
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// RUN: cat %t.host | FileCheck -check-prefix=HOST-NEG %s
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// Check postfix for CUDA.
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// RUN: %clang_cc1 -triple nvptx -fcuda-is-device -cuid=abc \
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// RUN: -std=c++11 -fgpu-rdc -emit-llvm -o - %s | FileCheck \
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// RUN: -check-prefixes=CUDA %s
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#include "Inputs/cuda.h"
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// Make sure we can still mangle with a line directive.
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#line 0 "-"
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// Test function scope static device variable, which should not be externalized.
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// DEV-DAG: @_ZZ6kernelPiPPKiE1w = internal addrspace(4) constant i32 1
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// HOST-DAG: @_ZL1x = internal global i32 undef
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// HOST-DAG: @_ZL1y = internal global i32 undef
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// Test normal static device variables
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// INT-DEV-DAG: @_ZL1x[[FILEID:.*]] = addrspace(1) externally_initialized global i32 0
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// INT-HOST-DAG: @[[DEVNAMEX:[0-9]+]] = {{.*}}c"_ZL1x[[FILEID:.*]]\00"
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// Test externalized static device variables
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// EXT-DEV-DAG: @_ZL1x.static.[[HASH:.*]] = addrspace(1) externally_initialized global i32 0
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// EXT-HOST-DAG: @[[DEVNAMEX:[0-9]+]] = {{.*}}c"_ZL1x.static.[[HASH:.*]]\00"
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// CUDA-DAG: @_ZL1x__static__[[HASH:.*]] = addrspace(1) externally_initialized global i32 0
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// POSTFIX: @_ZL1x.static.[[HASH:.*]] = addrspace(1) externally_initialized global i32 0
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// POSTFIX: @[[DEVNAMEX:[0-9]+]] = {{.*}}c"_ZL1x.static.[[HASH]]\00"
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// POSTFIX-ID: @_ZL1x.static.[[FILEID:.*]] = addrspace(1) externally_initialized global i32 0
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// POSTFIX-ID: @[[DEVNAMEX:[0-9]+]] = {{.*}}c"_ZL1x.static.[[FILEID]]\00"
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static __device__ int x;
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// Test static device variables not used by host code should not be externalized
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// DEV-DAG: @_ZL2x2 = internal addrspace(1) global i32 0
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static __device__ int x2;
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// Test normal static device variables
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// INT-DEV-DAG: @_ZL1y[[FILEID:.*]] = addrspace(4) externally_initialized constant i32 0
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// INT-HOST-DAG: @[[DEVNAMEY:[0-9]+]] = {{.*}}c"_ZL1y[[FILEID:.*]]\00"
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// Test externalized static device variables
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// EXT-DEV-DAG: @_ZL1y.static.[[HASH]] = addrspace(4) externally_initialized constant i32 0
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// EXT-HOST-DAG: @[[DEVNAMEY:[0-9]+]] = {{.*}}c"_ZL1y.static.[[HASH]]\00"
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static __constant__ int y;
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// Test static host variable, which should not be externalized nor registered.
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// HOST-DAG: @_ZL1z = internal global i32 0
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// DEV-NEG-NOT: @_ZL1z
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static int z;
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// Test non-ODR-use of static device variable is not emitted or registered.
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// DEV-NEG-NOT: @_ZL1u
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// HOST-NEG-NOT: @_ZL1u
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static __device__ int u;
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// Test static device variable in inline function, which should not be
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// externalized nor registered.
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// DEV-DAG: @_ZZ6devfunPPKiE1p = linkonce_odr addrspace(4) constant i32 2, comdat
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inline __device__ void devfun(const int ** b) {
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const static int p = 2;
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b[0] = &p;
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}
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__global__ void kernel(int *a, const int **b) {
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const static int w = 1;
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a[0] = x;
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a[1] = y;
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a[2] = sizeof(u);
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b[0] = &w;
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b[1] = &x2;
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devfun(b);
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}
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int* getDeviceSymbol(int *x);
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void foo() {
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getDeviceSymbol(&x);
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getDeviceSymbol(&y);
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z = 123;
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decltype(u) tmp;
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}
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// HOST-DAG: __hipRegisterVar({{.*}}@_ZL1x, {{.*}}@[[DEVNAMEX]]
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// HOST-DAG: __hipRegisterVar({{.*}}@_ZL1y, {{.*}}@[[DEVNAMEY]]
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// HOST-NEG-NOT: __hipRegisterVar({{.*}}@_ZL2x2
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// HOST-NEG-NOT: __hipRegisterVar({{.*}}@_ZZ6kernelPiPPKiE1w
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// HOST-NEG-NOT: __hipRegisterVar({{.*}}@_ZZ6devfunPPKiE1p
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// HOST-NEG-NOT: __hipRegisterVar({{.*}}@_ZL1u
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