From: Joseph Huber <jhuber6@vols.utk.edu>
Date: Wed, 29 Jun 2022 19:48:16 +0000 (-0400)
Subject: [HIP] Generate offloading entries for HIP with the new driver.
X-Git-Tag: upstream/15.0.7~2073
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e88d53d25f3b48204615195615da35e575081903;p=platform%2Fupstream%2Fllvm.git

[HIP] Generate offloading entries for HIP with the new driver.

This patch adds the small change required to output offloading entried
for HIP instead of CUDA. These should be placed in different sections so
because they need to be distinct to the offloading toolchain, otherwise
we'd have HIP trying to register CUDA kernels or vice-versa. This patch will
precede support for HIP in the linker wrapper.

Reviewed By: yaxunl, tra

Differential Revision: https://reviews.llvm.org/D128850
---

diff --git a/clang/lib/CodeGen/CGCUDANV.cpp b/clang/lib/CodeGen/CGCUDANV.cpp
index 6f2679c..6a185c2 100644
--- a/clang/lib/CodeGen/CGCUDANV.cpp
+++ b/clang/lib/CodeGen/CGCUDANV.cpp
@@ -1116,7 +1116,8 @@ void CGNVCUDARuntime::createOffloadingEntries() {
   llvm::OpenMPIRBuilder OMPBuilder(CGM.getModule());
   OMPBuilder.initialize();
 
-  StringRef Section = "cuda_offloading_entries";
+  StringRef Section = CGM.getLangOpts().HIP ? "hip_offloading_entries"
+                                            : "cuda_offloading_entries";
   for (KernelInfo &I : EmittedKernels)
     OMPBuilder.emitOffloadingEntry(KernelHandles[I.Kernel],
                                    getDeviceSideName(cast<NamedDecl>(I.D)), 0,
diff --git a/clang/test/CodeGenCUDA/offloading-entries.cu b/clang/test/CodeGenCUDA/offloading-entries.cu
index f243028..544dcec 100644
--- a/clang/test/CodeGenCUDA/offloading-entries.cu
+++ b/clang/test/CodeGenCUDA/offloading-entries.cu
@@ -1,33 +1,57 @@
-// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-globals
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-globals --global-value-regex ".omp_offloading.entry.*"
 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux-gnu \
 // RUN:   --offload-new-driver -emit-llvm -o - -x cuda  %s | FileCheck \
-// RUN:   --check-prefix=HOST %s
+// RUN:   --check-prefix=CUDA %s
+// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux-gnu \
+// RUN:   --offload-new-driver -emit-llvm -o - -x hip  %s | FileCheck \
+// RUN:   --check-prefix=HIP %s
 
 #include "Inputs/cuda.h"
 
 //.
-// HOST: @x = internal global i32 undef, align 4
-// HOST: @.omp_offloading.entry_name = internal unnamed_addr constant [8 x i8] c"_Z3foov\00"
-// HOST: @.omp_offloading.entry._Z3foov = weak constant %struct.__tgt_offload_entry { ptr @_Z18__device_stub__foov, ptr @.omp_offloading.entry_name, i64 0, i32 0, i32 0 }, section "cuda_offloading_entries", align 1
-// HOST: @.omp_offloading.entry_name.1 = internal unnamed_addr constant [8 x i8] c"_Z3barv\00"
-// HOST: @.omp_offloading.entry._Z3barv = weak constant %struct.__tgt_offload_entry { ptr @_Z18__device_stub__barv, ptr @.omp_offloading.entry_name.1, i64 0, i32 0, i32 0 }, section "cuda_offloading_entries", align 1
-// HOST: @.omp_offloading.entry_name.2 = internal unnamed_addr constant [2 x i8] c"x\00"
-// HOST: @.omp_offloading.entry.x = weak constant %struct.__tgt_offload_entry { ptr @x, ptr @.omp_offloading.entry_name.2, i64 4, i32 0, i32 0 }, section "cuda_offloading_entries", align 1
+// CUDA: @.omp_offloading.entry_name = internal unnamed_addr constant [8 x i8] c"_Z3foov\00"
+// CUDA: @.omp_offloading.entry._Z3foov = weak constant %struct.__tgt_offload_entry { ptr @_Z18__device_stub__foov, ptr @.omp_offloading.entry_name, i64 0, i32 0, i32 0 }, section "cuda_offloading_entries", align 1
+// CUDA: @.omp_offloading.entry_name.1 = internal unnamed_addr constant [8 x i8] c"_Z3barv\00"
+// CUDA: @.omp_offloading.entry._Z3barv = weak constant %struct.__tgt_offload_entry { ptr @_Z18__device_stub__barv, ptr @.omp_offloading.entry_name.1, i64 0, i32 0, i32 0 }, section "cuda_offloading_entries", align 1
+// CUDA: @.omp_offloading.entry_name.2 = internal unnamed_addr constant [2 x i8] c"x\00"
+// CUDA: @.omp_offloading.entry.x = weak constant %struct.__tgt_offload_entry { ptr @x, ptr @.omp_offloading.entry_name.2, i64 4, i32 0, i32 0 }, section "cuda_offloading_entries", align 1
+//.
+// HIP: @.omp_offloading.entry_name = internal unnamed_addr constant [8 x i8] c"_Z3foov\00"
+// HIP: @.omp_offloading.entry._Z3foov = weak constant %struct.__tgt_offload_entry { ptr @_Z3foov, ptr @.omp_offloading.entry_name, i64 0, i32 0, i32 0 }, section "hip_offloading_entries", align 1
+// HIP: @.omp_offloading.entry_name.1 = internal unnamed_addr constant [8 x i8] c"_Z3barv\00"
+// HIP: @.omp_offloading.entry._Z3barv = weak constant %struct.__tgt_offload_entry { ptr @_Z3barv, ptr @.omp_offloading.entry_name.1, i64 0, i32 0, i32 0 }, section "hip_offloading_entries", align 1
+// HIP: @.omp_offloading.entry_name.2 = internal unnamed_addr constant [2 x i8] c"x\00"
+// HIP: @.omp_offloading.entry.x = weak constant %struct.__tgt_offload_entry { ptr @x, ptr @.omp_offloading.entry_name.2, i64 4, i32 0, i32 0 }, section "hip_offloading_entries", align 1
 //.
-// HOST-LABEL: @_Z18__device_stub__foov(
-// HOST-NEXT:  entry:
-// HOST-NEXT:    [[TMP0:%.*]] = call i32 @cudaLaunch(ptr @_Z18__device_stub__foov)
-// HOST-NEXT:    br label [[SETUP_END:%.*]]
-// HOST:       setup.end:
-// HOST-NEXT:    ret void
+// CUDA-LABEL: @_Z18__device_stub__foov(
+// CUDA-NEXT:  entry:
+// CUDA-NEXT:    [[TMP0:%.*]] = call i32 @cudaLaunch(ptr @_Z18__device_stub__foov)
+// CUDA-NEXT:    br label [[SETUP_END:%.*]]
+// CUDA:       setup.end:
+// CUDA-NEXT:    ret void
+//
+// HIP-LABEL: @_Z18__device_stub__foov(
+// HIP-NEXT:  entry:
+// HIP-NEXT:    [[TMP0:%.*]] = call i32 @hipLaunchByPtr(ptr @_Z3foov)
+// HIP-NEXT:    br label [[SETUP_END:%.*]]
+// HIP:       setup.end:
+// HIP-NEXT:    ret void
 //
 __global__ void foo() {}
-// HOST-LABEL: @_Z18__device_stub__barv(
-// HOST-NEXT:  entry:
-// HOST-NEXT:    [[TMP0:%.*]] = call i32 @cudaLaunch(ptr @_Z18__device_stub__barv)
-// HOST-NEXT:    br label [[SETUP_END:%.*]]
-// HOST:       setup.end:
-// HOST-NEXT:    ret void
+
+// CUDA-LABEL: @_Z18__device_stub__barv(
+// CUDA-NEXT:  entry:
+// CUDA-NEXT:    [[TMP0:%.*]] = call i32 @cudaLaunch(ptr @_Z18__device_stub__barv)
+// CUDA-NEXT:    br label [[SETUP_END:%.*]]
+// CUDA:       setup.end:
+// CUDA-NEXT:    ret void
+//
+// HIP-LABEL: @_Z18__device_stub__barv(
+// HIP-NEXT:  entry:
+// HIP-NEXT:    [[TMP0:%.*]] = call i32 @hipLaunchByPtr(ptr @_Z3barv)
+// HIP-NEXT:    br label [[SETUP_END:%.*]]
+// HIP:       setup.end:
+// HIP-NEXT:    ret void
 //
 __global__ void bar() {}
 __device__ int x = 1;