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; RUN: not --crash llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -verify-machineinstrs < %s 2>&1 | FileCheck %s
; This testcase fails register allocation at the same time it performs
; virtual register splitting (by introducing VGPR to AGPR copies). We
; still need to enqueue and allocate the newly split vregs after the
; failure.
; The machine verifier complains about usage of register
; which is marked as killed in previous instruction.
; This happens due to when register allocator is out of registers
; it takes the first avialable register.
; CHECK: error: ran out of registers during register allocation
; CHECK: Bad machine code: Using an undefined physical register
define amdgpu_kernel void @alloc_failure_with_split_vregs(float %v0, float %v1) #0 {
%agpr0 = call float asm sideeffect "; def $0", "=${a0}"()
%agpr.vec = insertelement <16 x float> undef, float %agpr0, i32 0
%mfma0 = call <16 x float> @llvm.amdgcn.mfma.f32.16x16x1f32(float %v0, float %v1, <16 x float> %agpr.vec, i32 0, i32 0, i32 0)
%mfma0.3 = extractelement <16 x float> %mfma0, i32 3
%insert = insertelement <16 x float> %mfma0, float %agpr0, i32 8
%mfma1 = call <16 x float> @llvm.amdgcn.mfma.f32.16x16x1f32(float %v0, float %v1, <16 x float> %insert, i32 0, i32 0, i32 0)
%mfma1.3 = extractelement <16 x float> %mfma1, i32 3
call void asm sideeffect "; use $0", "{a1}"(float %mfma1.3)
ret void
}
declare <16 x float> @llvm.amdgcn.mfma.f32.16x16x1f32(float, float, <16 x float>, i32 immarg, i32 immarg, i32 immarg) #1
declare i32 @llvm.amdgcn.workitem.id.x() #2
attributes #0 = { "amdgpu-waves-per-eu"="10,10" }
attributes #1 = { convergent nounwind readnone willreturn }
attributes #2 = { nounwind readnone speculatable willreturn }
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