18f9351223
The compiler was generating symbols in the final code object for local branch target labels. This bloats the code object, slows down the loader, and is only used to simplify disassembly. Use '--symbolize-operands' with llvm-objdump to improve readability of the branch target operands in disassembly. Fixes: SWDEV-312223 Reviewed By: scott.linder Differential Revision: https://reviews.llvm.org/D114273
58 lines
1.6 KiB
LLVM
58 lines
1.6 KiB
LLVM
; RUN: llc -mtriple=amdgcn--amdhsa -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
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; FIXME: merge with trap.ll
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; An s_cbranch_execnz is required to avoid trapping if all lanes are 0
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; GCN-LABEL: {{^}}trap_divergent_branch:
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; GCN: s_and_saveexec_b64
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; GCN: s_cbranch_execnz [[TRAP:.LBB[0-9]+_[0-9]+]]
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; GCN: ; %bb.{{[0-9]+}}:
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; GCN-NEXT: s_endpgm
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; GCN: [[TRAP]]:
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; GCN: s_trap 2
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; GCN-NEXT: s_endpgm
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define amdgpu_kernel void @trap_divergent_branch(i32 addrspace(1)* nocapture readonly %arg) {
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%id = call i32 @llvm.amdgcn.workitem.id.x()
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%gep = getelementptr inbounds i32, i32 addrspace(1)* %arg, i32 %id
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%divergent.val = load i32, i32 addrspace(1)* %gep
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%cmp = icmp eq i32 %divergent.val, 0
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br i1 %cmp, label %bb, label %end
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bb:
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call void @llvm.trap()
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br label %end
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end:
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ret void
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}
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; GCN-LABEL: {{^}}debugtrap_divergent_branch:
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; GCN: s_and_saveexec_b64
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; GCN: s_cbranch_execz [[ENDPGM:.LBB[0-9]+_[0-9]+]]
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; GCN: ; %bb.{{[0-9]+}}:
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; GCN: s_trap 3
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; GCN-NEXT: [[ENDPGM]]:
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; GCN-NEXT: s_endpgm
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define amdgpu_kernel void @debugtrap_divergent_branch(i32 addrspace(1)* nocapture readonly %arg) {
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%id = call i32 @llvm.amdgcn.workitem.id.x()
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%gep = getelementptr inbounds i32, i32 addrspace(1)* %arg, i32 %id
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%divergent.val = load i32, i32 addrspace(1)* %gep
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%cmp = icmp eq i32 %divergent.val, 0
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br i1 %cmp, label %bb, label %end
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bb:
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call void @llvm.debugtrap()
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br label %end
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end:
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ret void
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}
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declare void @llvm.trap() #0
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declare void @llvm.debugtrap() #1
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declare i32 @llvm.amdgcn.workitem.id.x() #2
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attributes #0 = { nounwind noreturn }
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attributes #1 = { nounwind }
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attributes #2 = { nounwind readnone speculatable }
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