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602acbf7d4
The patch computes the return address for the current function. Differential revision: https://reviews.llvm.org/D59666 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@362001 91177308-0d34-0410-b5e6-96231b3b80d8
66 lines
1.5 KiB
LLVM
66 lines
1.5 KiB
LLVM
; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck --check-prefix=GCN %s
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; Test with zero frame
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; GCN-LABEL: {{^}}func1
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; GCN: v_mov_b32_e32 v0, s30
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; GCN: v_mov_b32_e32 v1, s31
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; GCN: s_setpc_b64 s[30:31]
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define i8* @func1() nounwind {
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entry:
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%0 = tail call i8* @llvm.returnaddress(i32 0)
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ret i8* %0
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}
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; Test with non-zero frame
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; GCN-LABEL: {{^}}func2
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; GCN: v_mov_b32_e32 v0, 0
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; GCN: v_mov_b32_e32 v1, 0
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; GCN: s_setpc_b64 s[30:31]
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define i8* @func2() nounwind {
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entry:
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%0 = tail call i8* @llvm.returnaddress(i32 1)
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ret i8* %0
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}
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; Test with amdgpu_kernel
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; GCN-LABEL: {{^}}func3
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; GCN: v_mov_b32_e32 v0, 0
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; GCN: v_mov_b32_e32 v1, v0
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define amdgpu_kernel void @func3(i8** %out) nounwind {
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entry:
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%tmp = tail call i8* @llvm.returnaddress(i32 0)
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store i8* %tmp, i8** %out, align 4
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ret void
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}
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; Test with use outside the entry-block
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; GCN-LABEL: {{^}}func4
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; GCN: v_mov_b32_e32 v0, 0
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; GCN: v_mov_b32_e32 v1, v0
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define amdgpu_kernel void @func4(i8** %out, i32 %val) nounwind {
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entry:
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%cmp = icmp ne i32 %val, 0
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br i1 %cmp, label %store, label %exit
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store:
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%tmp = tail call i8* @llvm.returnaddress(i32 1)
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store i8* %tmp, i8** %out, align 4
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ret void
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exit:
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ret void
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}
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; Test ending in unreachable
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; GCN-LABEL: {{^}}func5
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; GCN: v_mov_b32_e32 v0, 0
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define void @func5() nounwind {
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entry:
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%tmp = tail call i8* @llvm.returnaddress(i32 2)
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store volatile i32 0, i32 addrspace(3)* undef, align 4
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unreachable
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}
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declare i8* @llvm.returnaddress(i32) nounwind readnone
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