[clang] [CIR][AMDGPU] Add support for AMDGCN div_fixup builtins (PR #197468)

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github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 89839 tests passed
* 837 tests skipped
* 2 tests failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.CIR/CodeGenHIP/builtins-amdgcn.hip</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 4
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -triple amdgcn-amd-amdhsa -x hip -std=c++11 -fclangir             -target-cpu tahiti -fcuda-is-device -emit-cir /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/CIR/CodeGenHIP/Output/builtins-amdgcn.hip.tmp.cir
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -triple amdgcn-amd-amdhsa -x hip -std=c++11 -fclangir -target-cpu tahiti -fcuda-is-device -emit-cir /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/CIR/CodeGenHIP/Output/builtins-amdgcn.hip.tmp.cir
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:94:55: error: function definition is not allowed here
# |    94 | __device__ void test_readlane(int* out, int a, int b) {
# |       |                                                       ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:102:53: error: function definition is not allowed here
# |   102 | __device__ void test_readfirstlane(int* out, int a) {
# |       |                                                     ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:110:82: error: function definition is not allowed here
# |   110 | __device__ void test_dispatch_ptr(__attribute__((address_space(4))) void ** out) {
# |       |                                                                                  ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:112:2: error: expected '}'
# |   112 | }
# |       |  ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:87:79: note: to match this '{'
# |    87 | __device__ void test_div_fixup_f64(double* out, double a, double b, double c) {
# |       |                                                                               ^
# | 4 errors generated when compiling for tahiti.
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>
<details>
<summary>Clang.CIR/CodeGenHIP/builtins-amdgcn.hip</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 4
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -triple amdgcn-amd-amdhsa -x hip -std=c++11 -fclangir             -target-cpu tahiti -fcuda-is-device -emit-cir /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/CIR/CodeGenHIP/Output/builtins-amdgcn.hip.tmp.cir
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang -cc1 -internal-isystem /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/23/include -nostdsysteminc -triple amdgcn-amd-amdhsa -x hip -std=c++11 -fclangir -target-cpu tahiti -fcuda-is-device -emit-cir /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip -o /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/CIR/CodeGenHIP/Output/builtins-amdgcn.hip.tmp.cir
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:94:55: error: function definition is not allowed here
# |    94 | __device__ void test_readlane(int* out, int a, int b) {
# |       |                                                       ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:102:53: error: function definition is not allowed here
# |   102 | __device__ void test_readfirstlane(int* out, int a) {
# |       |                                                     ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:110:82: error: function definition is not allowed here
# |   110 | __device__ void test_dispatch_ptr(__attribute__((address_space(4))) void ** out) {
# |       |                                                                                  ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:112:2: error: expected '}'
# |   112 | }
# |       |  ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/CodeGenHIP/builtins-amdgcn.hip:87:79: note: to match this '{'
# |    87 | __device__ void test_div_fixup_f64(double* out, double a, double b, double c) {
# |       |                                                                               ^
# | 4 errors generated when compiling for tahiti.
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/197468