[PATCH] D158246: [amdgpu] WIP variadics

[Jon Chesterfield via Phabricator via cfe-commits]

JonChesterfield added a comment.

Name candidates

- expand
- lower
- desugar
- transform

Lowering probably makes the most sense for the abi level apply to all functions, I like desugar to cover rewriting a subset of the graph



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Comment at: libc/config/gpu/entrypoints.txt:84-85
     # stdio.h entrypoints
+    libc.src.stdio.snprintf
+    libc.src.stdio.vsnprintf
     libc.src.stdio.puts
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arsenm wrote:
> Split of the libc stuff into a separate patch, the lowering pass should be a standalone change
There's quite a lot of wip in this patch. Your feedback is welcome, but you could also wait for a cleaned up version with your name on the reviewer list if you prefer. The libc plumbing is keeping track of which parts are currently passing for collaboration with jhuber6


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Comment at: llvm/test/CodeGen/AMDGPU/unsupported-calls.ll:57-58
 
 ; GCN: in function test_tail_call_bitcast_extern_variadic{{.*}}: unsupported required tail call to function extern_variadic
-; R600: in function test_tail_call_bitcast_extern_variadic{{.*}}: unsupported call to function extern_variadic
 define i32 @test_tail_call_bitcast_extern_variadic(<4 x float> %arg0, <4 x float> %arg1, i32 %arg2) {
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arsenm wrote:
> Deleted the wrong error?
this is curious - the test is passing as written, maybe a quirk of running it with not llc


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158246/new/

https://reviews.llvm.org/D158246