[llvm-branch-commits] [llvm] [AMDGPU] DPP wave reduction for double types - 1 (PR #189390)

[Matt Arsenault via llvm-branch-commits]

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@@ -858,6 +858,884 @@ entry:
   ret void
 }
 
+define void @divergent_value_double_dpp(ptr addrspace(1) %out, double %in) {
+; GFX8DAGISEL-LABEL: divergent_value_double_dpp:
+; GFX8DAGISEL:       ; %bb.0: ; %entry
+; GFX8DAGISEL-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX8DAGISEL-NEXT:    s_xor_saveexec_b64 s[4:5], -1
+; GFX8DAGISEL-NEXT:    buffer_store_dword v4, off, s[0:3], s32 ; 4-byte Folded Spill
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arsenm wrote:

Why is there all of this stack usage?

https://github.com/llvm/llvm-project/pull/189390