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08cdb00306
If we know we have stack objects, we reserve the registers that the private buffer resource and wave offset are passed and use them directly. If not, reserve the last 5 SGPRs just in case we need to spill. After register allocation, try to pick the next available registers instead of the last SGPRs, and then insert copies from the inputs to the reserved registers in the progloue. This also only selectively enables all of the input registers which are really required instead of always enabling them. llvm-svn: 254331
17 lines
615 B
LLVM
17 lines
615 B
LLVM
; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=kaveri -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
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; GCN-LABEL: {{^}}test:
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; GCN: enable_sgpr_dispatch_ptr = 1
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; GCN: s_load_dword s{{[0-9]+}}, s[4:5], 0x0
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define void @test(i32 addrspace(1)* %out) {
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%dispatch_ptr = call noalias i8 addrspace(2)* @llvm.amdgcn.dispatch.ptr() #0
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%header_ptr = bitcast i8 addrspace(2)* %dispatch_ptr to i32 addrspace(2)*
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%value = load i32, i32 addrspace(2)* %header_ptr
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store i32 %value, i32 addrspace(1)* %out
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ret void
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}
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declare noalias i8 addrspace(2)* @llvm.amdgcn.dispatch.ptr() #0
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attributes #0 = { readnone }
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