155 lines
6.4 KiB
LLVM
155 lines
6.4 KiB
LLVM
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; RUN: opt -data-layout=A5 -mtriple=amdgcn-unknown-amdhsa -loop-unroll -S %s | FileCheck %s
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; Check that we full unroll loop to be able to eliminate alloca
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; CHECK-LABEL: @non_invariant_ind
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; CHECK: for.body:
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; CHECK-NOT: br
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; CHECK: store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
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; CHECK: ret void
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define amdgpu_kernel void @non_invariant_ind(i32 addrspace(1)* nocapture %a, i32 %x) {
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entry:
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%arr = alloca [64 x i32], align 4, addrspace(5)
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%tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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%arrayidx5 = getelementptr inbounds [64 x i32], [64 x i32] addrspace(5)* %arr, i32 0, i32 %x
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%tmp15 = load i32, i32 addrspace(5)* %arrayidx5, align 4
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%arrayidx7 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
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store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
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ret void
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for.body: ; preds = %for.body, %entry
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%i.015 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%idxprom = sext i32 %i.015 to i64
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%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
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%tmp16 = load i32, i32 addrspace(1)* %arrayidx, align 4
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%add = add nsw i32 %i.015, %tmp1
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%rem = srem i32 %add, 64
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%arrayidx3 = getelementptr inbounds [64 x i32], [64 x i32] addrspace(5)* %arr, i32 0, i32 %rem
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store i32 %tmp16, i32 addrspace(5)* %arrayidx3, align 4
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%inc = add nuw nsw i32 %i.015, 1
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%exitcond = icmp eq i32 %inc, 100
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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}
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; Check that we unroll inner loop but not outer
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; CHECK-LABEL: @invariant_ind
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; CHECK: %[[exitcond:[^ ]+]] = icmp eq i32 %{{.*}}, 32
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; CHECK: br i1 %[[exitcond]]
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; CHECK-NOT: icmp eq i32 %{{.*}}, 100
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define amdgpu_kernel void @invariant_ind(i32 addrspace(1)* nocapture %a, i32 %x) {
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entry:
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%arr = alloca [64 x i32], align 4, addrspace(5)
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%tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
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br label %for.cond2.preheader
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for.cond2.preheader: ; preds = %for.cond.cleanup5, %entry
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%i.026 = phi i32 [ 0, %entry ], [ %inc10, %for.cond.cleanup5 ]
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%idxprom = sext i32 %i.026 to i64
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%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
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%tmp15 = load i32, i32 addrspace(1)* %arrayidx, align 4
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br label %for.body6
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for.cond.cleanup: ; preds = %for.cond.cleanup5
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%arrayidx13 = getelementptr inbounds [64 x i32], [64 x i32] addrspace(5)* %arr, i32 0, i32 %x
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%tmp16 = load i32, i32 addrspace(5)* %arrayidx13, align 4
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%arrayidx15 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
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store i32 %tmp16, i32 addrspace(1)* %arrayidx15, align 4
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ret void
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for.cond.cleanup5: ; preds = %for.body6
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%inc10 = add nuw nsw i32 %i.026, 1
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%exitcond27 = icmp eq i32 %inc10, 32
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br i1 %exitcond27, label %for.cond.cleanup, label %for.cond2.preheader
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for.body6: ; preds = %for.body6, %for.cond2.preheader
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%j.025 = phi i32 [ 0, %for.cond2.preheader ], [ %inc, %for.body6 ]
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%add = add nsw i32 %j.025, %tmp1
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%rem = srem i32 %add, 64
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%arrayidx8 = getelementptr inbounds [64 x i32], [64 x i32] addrspace(5)* %arr, i32 0, i32 %rem
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store i32 %tmp15, i32 addrspace(5)* %arrayidx8, align 4
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%inc = add nuw nsw i32 %j.025, 1
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%exitcond = icmp eq i32 %inc, 100
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br i1 %exitcond, label %for.cond.cleanup5, label %for.body6
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}
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; Check we do not enforce unroll if alloca is too big
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; CHECK-LABEL: @too_big
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; CHECK: for.body:
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; CHECK: icmp eq i32 %{{.*}}, 100
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; CHECK: br
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define amdgpu_kernel void @too_big(i32 addrspace(1)* nocapture %a, i32 %x) {
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entry:
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%arr = alloca [256 x i32], align 4, addrspace(5)
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%tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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%arrayidx5 = getelementptr inbounds [256 x i32], [256 x i32] addrspace(5)* %arr, i32 0, i32 %x
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%tmp15 = load i32, i32 addrspace(5)* %arrayidx5, align 4
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%arrayidx7 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
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store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
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ret void
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for.body: ; preds = %for.body, %entry
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%i.015 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%idxprom = sext i32 %i.015 to i64
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%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
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%tmp16 = load i32, i32 addrspace(1)* %arrayidx, align 4
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%add = add nsw i32 %i.015, %tmp1
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%rem = srem i32 %add, 64
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%arrayidx3 = getelementptr inbounds [256 x i32], [256 x i32] addrspace(5)* %arr, i32 0, i32 %rem
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store i32 %tmp16, i32 addrspace(5)* %arrayidx3, align 4
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%inc = add nuw nsw i32 %i.015, 1
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%exitcond = icmp eq i32 %inc, 100
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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}
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; Check we do not enforce unroll if alloca is dynamic
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; CHECK-LABEL: @dynamic_size_alloca(
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; CHECK: alloca i32, i32 %n
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; CHECK: for.body:
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; CHECK: icmp eq i32 %{{.*}}, 100
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; CHECK: br
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define amdgpu_kernel void @dynamic_size_alloca(i32 addrspace(1)* nocapture %a, i32 %n, i32 %x) {
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entry:
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%arr = alloca i32, i32 %n, align 4, addrspace(5)
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%tmp1 = tail call i32 @llvm.amdgcn.workitem.id.x() #1
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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%arrayidx5 = getelementptr inbounds i32, i32 addrspace(5)* %arr, i32 %x
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%tmp15 = load i32, i32 addrspace(5)* %arrayidx5, align 4
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%arrayidx7 = getelementptr inbounds i32, i32 addrspace(1)* %a, i32 %tmp1
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store i32 %tmp15, i32 addrspace(1)* %arrayidx7, align 4
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ret void
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for.body: ; preds = %for.body, %entry
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%i.015 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%idxprom = sext i32 %i.015 to i64
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%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %a, i64 %idxprom
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%tmp16 = load i32, i32 addrspace(1)* %arrayidx, align 4
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%add = add nsw i32 %i.015, %tmp1
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%rem = srem i32 %add, 64
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%arrayidx3 = getelementptr inbounds i32, i32 addrspace(5)* %arr, i32 %rem
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store i32 %tmp16, i32 addrspace(5)* %arrayidx3, align 4
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%inc = add nuw nsw i32 %i.015, 1
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%exitcond = icmp eq i32 %inc, 100
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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}
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declare i8 addrspace(4)* @llvm.amdgcn.dispatch.ptr() #1
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declare i32 @llvm.amdgcn.workitem.id.x() #1
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declare i32 @llvm.amdgcn.workgroup.id.x() #1
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declare i8 addrspace(4)* @llvm.amdgcn.implicitarg.ptr() #1
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attributes #1 = { nounwind readnone }
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