AMDGPU: Replace half undef uses with poison in tests (#131083)

Author: arsenm

llvm/test/CodeGen/AMDGPU/GlobalISel/clamp-minmax-const-combine.ll

@@ -108,8 +108,8 @@ define <2 x half> @test_min_max_splat_padded_with_undef(<2 x half> %a) #2 {
 ; GFX12-NEXT:    v_pk_mul_f16 v0, v0, 2.0 op_sel_hi:[1,0] clamp
 ; GFX12-NEXT:    s_setpc_b64 s[30:31]
   %fmul = fmul <2 x half> %a, <half 2.0, half 2.0>
-  %maxnum = call <2 x half> @llvm.maxnum.v2f16(<2 x half> <half 0.0, half undef>, <2 x half> %fmul)
-  %fmed = call <2 x half> @llvm.minnum.v2f16(<2 x half> <half 1.0, half undef>, <2 x half> %maxnum)
+  %maxnum = call <2 x half> @llvm.maxnum.v2f16(<2 x half> <half 0.0, half poison>, <2 x half> %fmul)
+  %fmed = call <2 x half> @llvm.minnum.v2f16(<2 x half> <half 1.0, half poison>, <2 x half> %maxnum)
   ret <2 x half> %fmed
 }
 
@@ -199,8 +199,8 @@ define <2 x half> @test_max_K0min_K1Val_v2f16(<2 x half> %a) #1 {
 ; GFX12-NEXT:    v_pk_mul_f16 v0, v0, 2.0 op_sel_hi:[1,0] clamp
 ; GFX12-NEXT:    s_setpc_b64 s[30:31]
   %fmul = fmul <2 x half> %a, <half 2.0, half 2.0>
-  %minnum = call nnan <2 x half> @llvm.minnum.v2f16(<2 x half> <half 1.0, half undef>, <2 x half> %fmul)
-  %fmed = call nnan <2 x half> @llvm.maxnum.v2f16(<2 x half> <half undef, half 0.0>, <2 x half> %minnum)
+  %minnum = call nnan <2 x half> @llvm.minnum.v2f16(<2 x half> <half 1.0, half poison>, <2 x half> %fmul)
+  %fmed = call nnan <2 x half> @llvm.maxnum.v2f16(<2 x half> <half poison, half 0.0>, <2 x half> %minnum)
   ret <2 x half> %fmed
 }
 

llvm/test/CodeGen/AMDGPU/clamp.ll

@@ -3066,8 +3066,8 @@ define amdgpu_kernel void @v_clamp_v2f16_undef_elt(ptr addrspace(1) %out, ptr ad
   %gep0 = getelementptr <2 x half>, ptr addrspace(1) %aptr, i32 %tid
   %out.gep = getelementptr <2 x half>, ptr addrspace(1) %out, i32 %tid
   %a = load <2 x half>, ptr addrspace(1) %gep0
-  %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> <half undef, half 0.0>)
-  %med = call <2 x half> @llvm.minnum.v2f16(<2 x half> %max, <2 x half> <half 1.0, half undef>)
+  %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> <half poison, half 0.0>)
+  %med = call <2 x half> @llvm.minnum.v2f16(<2 x half> %max, <2 x half> <half 1.0, half poison>)
 
   store <2 x half> %med, ptr addrspace(1) %out.gep
   ret void
@@ -3827,8 +3827,8 @@ define amdgpu_kernel void @v_clamp_v2f16_undef_limit_elts0(ptr addrspace(1) %out
   %gep0 = getelementptr <2 x half>, ptr addrspace(1) %aptr, i32 %tid
   %out.gep = getelementptr <2 x half>, ptr addrspace(1) %out, i32 %tid
   %a = load <2 x half>, ptr addrspace(1) %gep0
-  %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> <half 0.0, half undef>)
-  %med = call <2 x half> @llvm.minnum.v2f16(<2 x half> %max, <2 x half> <half undef, half 1.0>)
+  %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> <half 0.0, half poison>)
+  %med = call <2 x half> @llvm.minnum.v2f16(<2 x half> %max, <2 x half> <half poison, half 1.0>)
 
   store <2 x half> %med, ptr addrspace(1) %out.gep
   ret void
@@ -3925,8 +3925,8 @@ define amdgpu_kernel void @v_clamp_v2f16_undef_limit_elts1(ptr addrspace(1) %out
   %gep0 = getelementptr <2 x half>, ptr addrspace(1) %aptr, i32 %tid
   %out.gep = getelementptr <2 x half>, ptr addrspace(1) %out, i32 %tid
   %a = load <2 x half>, ptr addrspace(1) %gep0
-  %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> <half undef, half 0.0>)
-  %med = call <2 x half> @llvm.minnum.v2f16(<2 x half> %max, <2 x half> <half 1.0, half undef>)
+  %max = call <2 x half> @llvm.maxnum.v2f16(<2 x half> %a, <2 x half> <half poison, half 0.0>)
+  %med = call <2 x half> @llvm.minnum.v2f16(<2 x half> %max, <2 x half> <half 1.0, half poison>)
 
   store <2 x half> %med, ptr addrspace(1) %out.gep
   ret void

llvm/test/CodeGen/AMDGPU/inline-constraints.ll

@@ -301,7 +301,7 @@ define i32 @inline_A_constraint_V2() {
 
 ; NOGCN: error: invalid operand for inline asm constraint 'A'
 define i32 @inline_A_constraint_V3() {
-  %v0 = tail call i32 asm "v_mov_b32 $0, $1", "=v,A"(<2 x half> <half undef, half -0.5>)
+  %v0 = tail call i32 asm "v_mov_b32 $0, $1", "=v,A"(<2 x half> <half poison, half -0.5>)
   ret i32 %v0
 }