1; RUN: opt -mtriple=amdgcn-- -loop-unroll -simplifycfg -sroa %s -S -o - | FileCheck %s 2; RUN: opt -mtriple=r600-- -loop-unroll -simplifycfg -sroa %s -S -o - | FileCheck %s 3 4 5; This test contains a simple loop that initializes an array declared in 6; private memory. We want to make sure these kinds of loops are always 7; unrolled, because private memory is slow. 8 9; CHECK-LABEL: @private_memory 10; CHECK-NOT: alloca 11; CHECK: store i32 5, i32 addrspace(1)* %out 12define amdgpu_kernel void @private_memory(i32 addrspace(1)* %out) { 13entry: 14 %0 = alloca [32 x i32] 15 br label %loop.header 16 17loop.header: 18 %counter = phi i32 [0, %entry], [%inc, %loop.inc] 19 br label %loop.body 20 21loop.body: 22 %ptr = getelementptr [32 x i32], [32 x i32]* %0, i32 0, i32 %counter 23 store i32 %counter, i32* %ptr 24 br label %loop.inc 25 26loop.inc: 27 %inc = add i32 %counter, 1 28 %1 = icmp sge i32 %counter, 32 29 br i1 %1, label %exit, label %loop.header 30 31exit: 32 %2 = getelementptr [32 x i32], [32 x i32]* %0, i32 0, i32 5 33 %3 = load i32, i32* %2 34 store i32 %3, i32 addrspace(1)* %out 35 ret void 36} 37 38; Check that loop is unrolled for local memory references 39 40; CHECK-LABEL: @local_memory 41; CHECK: getelementptr i32, i32 addrspace(1)* %out, i32 128 42; CHECK-NEXT: store 43; CHECK-NEXT: ret 44define amdgpu_kernel void @local_memory(i32 addrspace(1)* %out, i32 addrspace(3)* %lds) { 45entry: 46 br label %loop.header 47 48loop.header: 49 %counter = phi i32 [0, %entry], [%inc, %loop.inc] 50 br label %loop.body 51 52loop.body: 53 %ptr_lds = getelementptr i32, i32 addrspace(3)* %lds, i32 %counter 54 %val = load i32, i32 addrspace(3)* %ptr_lds 55 %ptr_out = getelementptr i32, i32 addrspace(1)* %out, i32 %counter 56 store i32 %val, i32 addrspace(1)* %ptr_out 57 br label %loop.inc 58 59loop.inc: 60 %inc = add i32 %counter, 1 61 %cond = icmp sge i32 %counter, 128 62 br i1 %cond, label %exit, label %loop.header 63 64exit: 65 ret void 66} 67 68; Check that a loop with if inside completely unrolled to eliminate phi and if 69 70; CHECK-LABEL: @unroll_for_if 71; CHECK: entry: 72; CHECK-NEXT: getelementptr 73; CHECK-NEXT: store 74; CHECK-NEXT: getelementptr 75; CHECK-NEXT: store 76; CHECK-NOT: br 77define amdgpu_kernel void @unroll_for_if(i32* %a) { 78entry: 79 br label %for.body 80 81for.body: ; preds = %entry, %for.inc 82 %i1 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] 83 %and = and i32 %i1, 1 84 %tobool = icmp eq i32 %and, 0 85 br i1 %tobool, label %for.inc, label %if.then 86 87if.then: ; preds = %for.body 88 %0 = sext i32 %i1 to i64 89 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %0 90 store i32 0, i32* %arrayidx, align 4 91 br label %for.inc 92 93for.inc: ; preds = %for.body, %if.then 94 %inc = add nuw nsw i32 %i1, 1 95 %cmp = icmp ult i32 %inc, 48 96 br i1 %cmp, label %for.body, label %for.end 97 98for.end: ; preds = %for.cond 99 ret void 100} 101