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
65 lines
1.4 KiB
LLVM
65 lines
1.4 KiB
LLVM
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=hawaii < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
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; A call should be skipped if all lanes are zero, since we don't know
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; what side effects should be avoided inside the call.
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define hidden void @func() #1 {
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ret void
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}
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; GCN-LABEL: {{^}}if_call:
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; GCN: s_and_saveexec_b64
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; GCN-NEXT: s_cbranch_execz [[END:.LBB[0-9]+_[0-9]+]]
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; GCN: s_swappc_b64
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; GCN: [[END]]:
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define void @if_call(i32 %flag) #0 {
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%cc = icmp eq i32 %flag, 0
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br i1 %cc, label %call, label %end
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call:
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call void @func()
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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: {{^}}if_asm:
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; GCN: s_and_saveexec_b64
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; GCN-NEXT: s_cbranch_execz [[END:.LBB[0-9]+_[0-9]+]]
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; GCN: ; sample asm
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; GCN: [[END]]:
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define void @if_asm(i32 %flag) #0 {
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%cc = icmp eq i32 %flag, 0
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br i1 %cc, label %call, label %end
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call:
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call void asm sideeffect "; sample asm", ""()
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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: {{^}}if_call_kernel:
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; GCN: s_and_saveexec_b64
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; GCN-NEXT: s_cbranch_execz .LBB3_2
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; GCN: s_swappc_b64
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define amdgpu_kernel void @if_call_kernel() #0 {
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%id = call i32 @llvm.amdgcn.workitem.id.x()
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%cc = icmp eq i32 %id, 0
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br i1 %cc, label %call, label %end
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call:
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call void @func()
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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 i32 @llvm.amdgcn.workitem.id.x() #2
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attributes #0 = { nounwind }
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attributes #1 = { nounwind noinline }
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attributes #2 = { nounwind readnone speculatable }
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