| ; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck --check-prefix=GCN %s |
| |
| ; Test with zero frame |
| ; GCN-LABEL: {{^}}func1 |
| ; GCN: v_mov_b32_e32 v0, s30 |
| ; GCN: v_mov_b32_e32 v1, s31 |
| ; GCN: s_setpc_b64 s[30:31] |
| define i8* @func1() nounwind { |
| entry: |
| %0 = tail call i8* @llvm.returnaddress(i32 0) |
| ret i8* %0 |
| } |
| |
| ; Test with non-zero frame |
| ; GCN-LABEL: {{^}}func2 |
| ; GCN: v_mov_b32_e32 v0, 0 |
| ; GCN: v_mov_b32_e32 v1, 0 |
| ; GCN: s_setpc_b64 s[30:31] |
| define i8* @func2() nounwind { |
| entry: |
| %0 = tail call i8* @llvm.returnaddress(i32 1) |
| ret i8* %0 |
| } |
| |
| ; Test with amdgpu_kernel |
| ; GCN-LABEL: {{^}}func3 |
| ; GCN: v_mov_b32_e32 v0, 0 |
| ; GCN: v_mov_b32_e32 v1, v0 |
| define amdgpu_kernel void @func3(i8** %out) nounwind { |
| entry: |
| %tmp = tail call i8* @llvm.returnaddress(i32 0) |
| store i8* %tmp, i8** %out, align 4 |
| ret void |
| } |
| |
| ; Test with use outside the entry-block |
| ; GCN-LABEL: {{^}}func4 |
| ; GCN: v_mov_b32_e32 v0, 0 |
| ; GCN: v_mov_b32_e32 v1, v0 |
| define amdgpu_kernel void @func4(i8** %out, i32 %val) nounwind { |
| entry: |
| %cmp = icmp ne i32 %val, 0 |
| br i1 %cmp, label %store, label %exit |
| |
| store: |
| %tmp = tail call i8* @llvm.returnaddress(i32 1) |
| store i8* %tmp, i8** %out, align 4 |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| ; Test ending in unreachable |
| ; GCN-LABEL: {{^}}func5 |
| ; GCN: v_mov_b32_e32 v0, 0 |
| define void @func5() nounwind { |
| entry: |
| %tmp = tail call i8* @llvm.returnaddress(i32 2) |
| store volatile i32 0, i32 addrspace(3)* undef, align 4 |
| unreachable |
| } |
| |
| |
| declare i8* @llvm.returnaddress(i32) nounwind readnone |