backend:AMDGPUconfirmedcrash-on-validgood first issuellvm:globalisel
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説明
The following bitcode module triggers an internal compiler error for -global-isel -O0 in f68ef5b4303de763ecf37fd57cbefc3891ee48c0:
define i32 @__ockl_get_num_groups() {
%1 = load i16, ptr addrspace(4) null, align 2
%2 = icmp ne i16 %1, 0
br label %3
3: ; preds = %0
%4 = phi i1 [ %2, %0 ]
%5 = zext i1 %4 to i32
ret i32 %5
}
Reproducer: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -O0 -global-isel module.ll
Failure: LLVM ERROR: cannot select: %12:sreg_64_xexec(s1) = G_PHI %11:vcc(s1), %bb.1 (in function: __ockl_get_num_groups
Bug found by @ElliotBLabs.