1 ; Remove 'S' Scalar Dependencies #119345
2 ; Scalar dependencies are not handled correctly, so they were removed to avoid
3 ; miscompiles. The loop nest in this test case used to be interchanged, but it's
4 ; no longer triggering. XFAIL'ing this test to indicate that this test should
5 ; interchanged if scalar deps are handled correctly.
9 ; RUN: opt -passes=loop-interchange -cache-line-size=64 -loop-interchange-threshold=-10 %s -pass-remarks-output=%t -disable-output
10 ; RUN: FileCheck -input-file %t %s
12 ; The test contains a GEP with an operand that is not SCEV-able. Make sure
13 ; loop-interchange does not crash.
16 ; CHECK-NEXT: Pass: loop-interchange
17 ; CHECK-NEXT: Name: Interchanged
18 ; CHECK-NEXT: Function: test
20 ; CHECK-NEXT: - String: Loop interchanged with enclosing loop.
22 define void @test(ptr noalias %src, ptr %dst) {
24 br label %outer.header
27 %i = phi i32 [ %i.next, %outer.latch ], [ 0, %entry ]
31 %j = phi i64 [ 0, %outer.header ], [ %j.next, %inner ]
32 %src.gep = getelementptr inbounds [256 x float], ptr %src, <2 x i64> <i64 0, i64 1>, i64 %j
33 %src.0 = extractelement <2 x ptr> %src.gep, i32 0
34 %lv.0 = load float, ptr %src.0
35 %add.0 = fadd float %lv.0, 1.0
36 %dst.gep = getelementptr inbounds float, ptr %dst, i64 %j
37 store float %add.0, ptr %dst.gep
38 %j.next = add nuw nsw i64 %j, 1
39 %inner.exitcond = icmp eq i64 %j.next, 100
40 br i1 %inner.exitcond, label %outer.latch, label %inner
43 %i.next = add nuw nsw i32 %i, 1
44 %outer.exitcond = icmp eq i32 %i.next, 100
45 br i1 %outer.exitcond, label %exit, label %outer.header