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67 lines
3.2 KiB
LLVM
67 lines
3.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -passes='require<libcall-lowering-info>,atomic-expand' %s | FileCheck -check-prefix=GFX90A %s
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declare i32 @llvm.amdgcn.workitem.id.x()
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define amdgpu_kernel void @divergent_cfg(ptr addrspace(1) %out, float %in) #0 {
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; GFX90A-LABEL: @divergent_cfg(
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; GFX90A-NEXT: entry:
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; GFX90A-NEXT: [[TID:%.*]] = call i32 @llvm.amdgcn.workitem.id.x()
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; GFX90A-NEXT: [[D_CMP:%.*]] = icmp ult i32 [[TID]], 16
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; GFX90A-NEXT: br i1 [[D_CMP]], label [[IF:%.*]], label [[ELSE:%.*]]
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; GFX90A: if:
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; GFX90A-NEXT: [[TMP0:%.*]] = load float, ptr addrspace(1) [[OUT:%.*]], align 4
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; GFX90A-NEXT: br label [[ATOMICRMW_START:%.*]]
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; GFX90A: atomicrmw.start:
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; GFX90A-NEXT: [[LOADED:%.*]] = phi float [ [[TMP0]], [[IF]] ], [ [[TMP4:%.*]], [[ATOMICRMW_START]] ]
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; GFX90A-NEXT: [[NEW:%.*]] = fadd float [[LOADED]], [[IN:%.*]]
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; GFX90A-NEXT: [[TMP1:%.*]] = bitcast float [[NEW]] to i32
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; GFX90A-NEXT: [[TMP2:%.*]] = bitcast float [[LOADED]] to i32
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; GFX90A-NEXT: [[TMP3:%.*]] = cmpxchg ptr addrspace(1) [[OUT]], i32 [[TMP2]], i32 [[TMP1]] seq_cst seq_cst, align 4
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; GFX90A-NEXT: [[SUCCESS:%.*]] = extractvalue { i32, i1 } [[TMP3]], 1
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; GFX90A-NEXT: [[NEWLOADED:%.*]] = extractvalue { i32, i1 } [[TMP3]], 0
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; GFX90A-NEXT: [[TMP4]] = bitcast i32 [[NEWLOADED]] to float
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; GFX90A-NEXT: br i1 [[SUCCESS]], label [[ATOMICRMW_END:%.*]], label [[ATOMICRMW_START]]
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; GFX90A: atomicrmw.end:
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; GFX90A-NEXT: br label [[ENDIF:%.*]]
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; GFX90A: else:
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; GFX90A-NEXT: [[TMP5:%.*]] = load float, ptr addrspace(1) [[OUT]], align 4
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; GFX90A-NEXT: br label [[ATOMICRMW_START2:%.*]]
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; GFX90A: atomicrmw.start2:
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; GFX90A-NEXT: [[LOADED3:%.*]] = phi float [ [[TMP5]], [[ELSE]] ], [ [[TMP9:%.*]], [[ATOMICRMW_START2]] ]
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; GFX90A-NEXT: [[NEW4:%.*]] = fadd float [[LOADED3]], [[IN]]
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; GFX90A-NEXT: [[TMP6:%.*]] = bitcast float [[NEW4]] to i32
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; GFX90A-NEXT: [[TMP7:%.*]] = bitcast float [[LOADED3]] to i32
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; GFX90A-NEXT: [[TMP8:%.*]] = cmpxchg ptr addrspace(1) [[OUT]], i32 [[TMP7]], i32 [[TMP6]] seq_cst seq_cst, align 4
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; GFX90A-NEXT: [[SUCCESS5:%.*]] = extractvalue { i32, i1 } [[TMP8]], 1
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; GFX90A-NEXT: [[NEWLOADED6:%.*]] = extractvalue { i32, i1 } [[TMP8]], 0
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; GFX90A-NEXT: [[TMP9]] = bitcast i32 [[NEWLOADED6]] to float
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; GFX90A-NEXT: br i1 [[SUCCESS5]], label [[ATOMICRMW_END1:%.*]], label [[ATOMICRMW_START2]]
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; GFX90A: atomicrmw.end1:
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; GFX90A-NEXT: br label [[ENDIF]]
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; GFX90A: endif:
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; GFX90A-NEXT: [[COMBINE:%.*]] = phi float [ [[TMP4]], [[ATOMICRMW_END]] ], [ [[TMP9]], [[ATOMICRMW_END1]] ]
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; GFX90A-NEXT: store float [[COMBINE]], ptr addrspace(1) [[OUT]], align 4
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; GFX90A-NEXT: ret void
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;
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entry:
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%tid = call i32 @llvm.amdgcn.workitem.id.x()
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%d_cmp = icmp ult i32 %tid, 16
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br i1 %d_cmp, label %if, label %else
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if:
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%res_if = atomicrmw fadd ptr addrspace(1) %out, float %in seq_cst
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br label %endif
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else:
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%res_else = atomicrmw fadd ptr addrspace(1) %out, float %in seq_cst
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br label %endif
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endif:
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%combine = phi float [%res_if, %if], [%res_else, %else]
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store float %combine, ptr addrspace(1) %out
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ret void
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}
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attributes #0 = { denormal_fpenv(float: preservesign) }
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