[clang] [AMDGPU][SPIRV] Correctly lower huge device function arguments (PR #176921)
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Wed Jan 21 00:55:59 PST 2026
github-actions[bot] wrote:
<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results
* 85874 tests passed
* 1216 tests skipped
* 1 test failed
## Failed Tests
(click on a test name to see its output)
### Clang
<details>
<summary>Clang.CodeGenHIP/device-function-huge-arg-ret.hip</summary>
```
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 1
/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 spirv64-amd-amdhsa -x hip -emit-llvm -fcuda-is-device -disable-llvm-verifier -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip --check-prefix=CHECK-AMDGCNSPIRV
# 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 spirv64-amd-amdhsa -x hip -emit-llvm -fcuda-is-device -disable-llvm-verifier -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip --check-prefix=CHECK-AMDGCNSPIRV
# note: command had no output on stdout or stderr
# RUN: at line 2
/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 -emit-llvm -fcuda-is-device -disable-llvm-verifier -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip --check-prefix=CHECK-AMDGCN
# 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 -emit-llvm -fcuda-is-device -disable-llvm-verifier -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip --check-prefix=CHECK-AMDGCN
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip:20:18: error: CHECK-AMDGCN: expected string not found in input
# | // CHECK-AMDGCN: define dso_local void @_Z21deviceFuncWithHugeArg11huge_struct(i16
# | ^
# | <stdin>:12:133: note: scanning from here
# | define dso_local void @_Z21deviceFuncWithHugeRetv(ptr addrspace(5) dead_on_unwind noalias writable sret(%struct.huge_struct) align 8 %agg.result) #0 {
# | ^
# | <stdin>:23:1: note: possible intended match here
# | define dso_local void @_Z21deviceFuncWithHugeArg11huge_struct(ptr addrspace(5) noundef byref(%struct.huge_struct) align 8 %0) #0 {
# | ^
# |
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CodeGenHIP/device-function-huge-arg-ret.hip
# |
# | -dump-input=help explains the following input dump.
# |
# | Input was:
# | <<<<<<
# | .
# | .
# | .
# | 7:
# | 8: @__hip_cuid_ = addrspace(1) global i8 0
# | 9: @llvm.compiler.used = appending addrspace(1) global [1 x ptr] [ptr addrspacecast (ptr addrspace(1) @__hip_cuid_ to ptr)], section "llvm.metadata"
# | 10:
# | 11: ; Function Attrs: convergent mustprogress noinline nounwind optnone
# | 12: define dso_local void @_Z21deviceFuncWithHugeRetv(ptr addrspace(5) dead_on_unwind noalias writable sret(%struct.huge_struct) align 8 %agg.result) #0 {
# | check:20'0 X~~~~~~~~~~~~~~~~~~ error: no match found
# | 13: entry:
# | check:20'0 ~~~~~~~
# | 14: call void @llvm.memset.p5.i64(ptr addrspace(5) align 8 %agg.result, i8 0, i64 54975581388800, i1 false)
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 15: %data = getelementptr inbounds nuw %struct.huge_struct, ptr addrspace(5) %agg.result, i32 0, i32 0
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 16: ret void
# | check:20'0 ~~~~~~~~~~
# | 17: }
# | check:20'0 ~~
# | 18:
# | check:20'0 ~
# | 19: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 20: declare void @llvm.memset.p5.i64(ptr addrspace(5) writeonly captures(none), i8, i64, i1 immarg) #1
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 21:
# | check:20'0 ~
# | 22: ; Function Attrs: convergent mustprogress noinline nounwind optnone
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 23: define dso_local void @_Z21deviceFuncWithHugeArg11huge_struct(ptr addrspace(5) noundef byref(%struct.huge_struct) align 8 %0) #0 {
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:20'1 ? possible intended match
# | 24: entry:
# | check:20'0 ~~~~~~~
# | 25: %coerce = alloca %struct.huge_struct, align 8, addrspace(5)
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 26: %X = addrspacecast ptr addrspace(5) %coerce to ptr
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 27: call void @llvm.memcpy.p0.p5.i64(ptr align 8 %X, ptr addrspace(5) align 8 %0, i64 54975581388800, i1 false)
# | check:20'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 28: ret void
# | check:20'0 ~~~~~~~~~~
# | .
# | .
# | .
# | >>>>>>
# `-----------------------------
# 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/176921
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