1 ; RUN: opt -loop-unroll -S -mtriple=amdgcn-- -mcpu=SI %s | FileCheck %s 2 3 ; This IR comes from this OpenCL C code: 4 ; 5 ; if (b + 4 > a) { 6 ; for (int i = 0; i < 4; i++, b++) { 7 ; if (b + 1 <= a) 8 ; *(dst + c + b) = 0; 9 ; else 10 ; break; 11 ; } 12 ; } 13 ; 14 ; This test is meant to check that this loop isn't unrolled into more than 15 ; four iterations. The loop unrolling preferences we currently use cause this 16 ; loop to not be unrolled at all, but that may change in the future. 17 18 ; CHECK-LABEL: @test 19 ; CHECK: store i8 0, i8 addrspace(1)* 20 ; CHECK-NOT: store i8 0, i8 addrspace(1)* 21 ; CHECK: ret void 22 define void @test(i8 addrspace(1)* nocapture %dst, i32 %a, i32 %b, i32 %c) { 23 entry: 24 %add = add nsw i32 %b, 4 25 %cmp = icmp sgt i32 %add, %a 26 br i1 %cmp, label %for.cond.preheader, label %if.end7 27 28 for.cond.preheader: ; preds = %entry 29 %cmp313 = icmp slt i32 %b, %a 30 br i1 %cmp313, label %if.then4.lr.ph, label %if.end7.loopexit 31 32 if.then4.lr.ph: ; preds = %for.cond.preheader 33 %0 = sext i32 %c to i64 34 br label %if.then4 35 36 if.then4: ; preds = %if.then4.lr.ph, %if.then4 37 %i.015 = phi i32 [ 0, %if.then4.lr.ph ], [ %inc, %if.then4 ] 38 %b.addr.014 = phi i32 [ %b, %if.then4.lr.ph ], [ %add2, %if.then4 ] 39 %add2 = add nsw i32 %b.addr.014, 1 40 %1 = sext i32 %b.addr.014 to i64 41 %add.ptr.sum = add nsw i64 %1, %0 42 %add.ptr5 = getelementptr inbounds i8, i8 addrspace(1)* %dst, i64 %add.ptr.sum 43 store i8 0, i8 addrspace(1)* %add.ptr5, align 1 44 %inc = add nsw i32 %i.015, 1 45 %cmp1 = icmp slt i32 %inc, 4 46 %cmp3 = icmp slt i32 %add2, %a 47 %or.cond = and i1 %cmp3, %cmp1 48 br i1 %or.cond, label %if.then4, label %for.cond.if.end7.loopexit_crit_edge 49 50 for.cond.if.end7.loopexit_crit_edge: ; preds = %if.then4 51 br label %if.end7.loopexit 52 53 if.end7.loopexit: ; preds = %for.cond.if.end7.loopexit_crit_edge, %for.cond.preheader 54 br label %if.end7 55 56 if.end7: ; preds = %if.end7.loopexit, %entry 57 ret void 58 } 59
