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1; RUN: llc -filetype=null %s2; Check that renameDisconnectedComponents() does not create vregs without a3; definition on every path (there should at least be IMPLICIT_DEF instructions).4target triple = "amdgcn--"5 6define amdgpu_kernel void @func(i1 %c0, i1 %c1, i1 %c2) {7B0:8 br i1 %c0, label %B1, label %B29 10B1:11 br label %B212 13B2:14 %v0 = phi <4 x float> [ zeroinitializer, %B1 ], [ <float 0.0, float 0.0, float 0.0, float poison>, %B0 ]15 br i1 %c1, label %B20.1, label %B20.216 17B20.1:18 br label %B20.219 20B20.2:21 %v2 = phi <4 x float> [ zeroinitializer, %B20.1 ], [ %v0, %B2 ]22 br i1 %c2, label %B30.1, label %B30.223 24B30.1:25 %sub = fsub <4 x float> %v2, undef26 br label %B30.227 28B30.2:29 %v3 = phi <4 x float> [ %sub, %B30.1 ], [ %v2, %B20.2 ]30 %ve0 = extractelement <4 x float> %v3, i32 031 store float %ve0, ptr addrspace(3) poison, align 432 ret void33}34