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|
; RUN: llc -mtriple=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=amdgcn -mcpu=tahiti -verify-machineinstrs -early-live-intervals < %s | FileCheck %s
; CHECK-LABEL: {{^}}fold_sgpr:
; CHECK: v_add_i32_e32 v{{[0-9]+}}, vcc, s
define amdgpu_kernel void @fold_sgpr(ptr addrspace(1) %out, i32 %fold) #1 {
entry:
%tmp0 = icmp ne i32 %fold, 0
br i1 %tmp0, label %if, label %endif
if:
%id = call i32 @llvm.amdgcn.workitem.id.x()
%offset = add i32 %fold, %id
%tmp1 = getelementptr i32, ptr addrspace(1) %out, i32 %offset
store i32 0, ptr addrspace(1) %tmp1
br label %endif
endif:
ret void
}
; CHECK-LABEL: {{^}}fold_imm:
; CHECK: v_or_b32_e32 v{{[0-9]+}}, 5
define amdgpu_kernel void @fold_imm(ptr addrspace(1) %out, i32 %cmp) #1 {
entry:
%fold = add i32 3, 2
%tmp0 = icmp ne i32 %cmp, 0
br i1 %tmp0, label %if, label %endif
if:
%id = call i32 @llvm.amdgcn.workitem.id.x()
%val = or i32 %id, %fold
store i32 %val, ptr addrspace(1) %out
br label %endif
endif:
ret void
}
; CHECK-LABEL: {{^}}fold_64bit_constant_add:
; CHECK-NOT: s_mov_b64
; FIXME: It would be better if we could use v_add here and drop the extra
; v_mov_b32 instructions.
; CHECK-DAG: s_add_u32 [[LO:s[0-9]+]], s{{[0-9]+}}, 1
; CHECK-DAG: s_addc_u32 [[HI:s[0-9]+]], s{{[0-9]+}}, 0
; CHECK-DAG: v_mov_b32_e32 v[[VLO:[0-9]+]], [[LO]]
; CHECK-DAG: v_mov_b32_e32 v[[VHI:[0-9]+]], [[HI]]
; CHECK: buffer_store_dwordx2 v[[[VLO]]:[[VHI]]],
define amdgpu_kernel void @fold_64bit_constant_add(ptr addrspace(1) %out, i32 %cmp, i64 %val) #1 {
entry:
%tmp0 = add i64 %val, 1
store i64 %tmp0, ptr addrspace(1) %out
ret void
}
; Inline constants should always be folded.
; CHECK-LABEL: {{^}}vector_inline:
; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
define amdgpu_kernel void @vector_inline(ptr addrspace(1) %out) #1 {
entry:
%tmp0 = call i32 @llvm.amdgcn.workitem.id.x()
%tmp1 = add i32 %tmp0, 1
%tmp2 = add i32 %tmp0, 2
%tmp3 = add i32 %tmp0, 3
%vec0 = insertelement <4 x i32> poison, i32 %tmp0, i32 0
%vec1 = insertelement <4 x i32> %vec0, i32 %tmp1, i32 1
%vec2 = insertelement <4 x i32> %vec1, i32 %tmp2, i32 2
%vec3 = insertelement <4 x i32> %vec2, i32 %tmp3, i32 3
%tmp4 = xor <4 x i32> <i32 5, i32 5, i32 5, i32 5>, %vec3
store <4 x i32> %tmp4, ptr addrspace(1) %out
ret void
}
; Immediates with one use should be folded
; CHECK-LABEL: {{^}}imm_one_use:
; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 0x64, v{{[0-9]+}}
define amdgpu_kernel void @imm_one_use(ptr addrspace(1) %out) #1 {
entry:
%tmp0 = call i32 @llvm.amdgcn.workitem.id.x()
%tmp1 = xor i32 %tmp0, 100
store i32 %tmp1, ptr addrspace(1) %out
ret void
}
; CHECK-LABEL: {{^}}vector_imm:
; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
define amdgpu_kernel void @vector_imm(ptr addrspace(1) %out) #1 {
entry:
%tmp0 = call i32 @llvm.amdgcn.workitem.id.x()
%tmp1 = add i32 %tmp0, 1
%tmp2 = add i32 %tmp0, 2
%tmp3 = add i32 %tmp0, 3
%vec0 = insertelement <4 x i32> poison, i32 %tmp0, i32 0
%vec1 = insertelement <4 x i32> %vec0, i32 %tmp1, i32 1
%vec2 = insertelement <4 x i32> %vec1, i32 %tmp2, i32 2
%vec3 = insertelement <4 x i32> %vec2, i32 %tmp3, i32 3
%tmp4 = xor <4 x i32> <i32 100, i32 100, i32 100, i32 100>, %vec3
store <4 x i32> %tmp4, ptr addrspace(1) %out
ret void
}
; A subregister use operand should not be tied.
; CHECK-LABEL: {{^}}no_fold_tied_subregister:
; CHECK: buffer_load_dwordx2 v[[[LO:[0-9]+]]:[[HI:[0-9]+]]]
; CHECK: v_madmk_f32 v[[RES:[0-9]+]], v[[HI]], 0x41200000, v[[LO]]
; CHECK: buffer_store_dword v[[RES]]
define amdgpu_kernel void @no_fold_tied_subregister() #1 {
%tmp1 = load volatile <2 x float>, ptr addrspace(1) poison
%tmp2 = extractelement <2 x float> %tmp1, i32 0
%tmp3 = extractelement <2 x float> %tmp1, i32 1
%tmp4 = fmul float %tmp3, 10.0
%tmp5 = fadd float %tmp4, %tmp2
store volatile float %tmp5, ptr addrspace(1) poison
ret void
}
; There should be exact one folding on the same operand.
; CHECK-LABEL: {{^}}no_extra_fold_on_same_opnd
; CHECK-NOT: %bb.1:
; CHECK: v_xor_b32_e32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
define void @no_extra_fold_on_same_opnd() #1 {
entry:
%s0 = load i32, ptr addrspace(5) poison, align 4
%s0.i64= zext i32 %s0 to i64
br label %for.body.i.i
for.body.i.i:
%s1 = load i32, ptr addrspace(1) poison, align 8
%s1.i64 = sext i32 %s1 to i64
%xor = xor i64 %s1.i64, %s0.i64
%flag = icmp ult i64 %xor, 8
br i1 %flag, label %if.then, label %if.else
if.then:
unreachable
if.else:
unreachable
}
; The compared constant is equal to {42, 42}. It cannot be reduced to
; a compare with 42.
define i32 @issue139908(i64 %in) {
; CHECK-LABEL: issue139908:
; CHECK: ; %bb.0:
; CHECK-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; CHECK-NEXT: s_mov_b32 s4, 42
; CHECK-NEXT: s_mov_b32 s5, s4
; CHECK-NEXT: v_cmp_eq_u64_e32 vcc, s[4:5], v[0:1]
; CHECK-NEXT: v_cndmask_b32_e64 v0, 2, 1, vcc
; CHECK-NEXT: s_setpc_b64 s[30:31]
%eq = icmp eq i64 %in, 180388626474
%result = select i1 %eq, i32 1, i32 2
ret i32 %result
}
declare i32 @llvm.amdgcn.workitem.id.x() #0
attributes #0 = { nounwind readnone }
attributes #1 = { nounwind "denormal-fp-math-f32"="preserve-sign,preserve-sign" }
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