| ; RUN: llc -march=x86 < %s | FileCheck %s |
| |
| ; The comparison happens after the relevant use, so the stride can easily |
| ; be changed. The comparison can be done in a narrower mode than the |
| ; induction variable. |
| ; TODO: By making the first store post-increment as well, the loop setup |
| ; could be made simpler. |
| |
| define void @foo() nounwind { |
| ; CHECK: foo: |
| ; CHECK-NOT: ret |
| ; CHECK: cmpl $10 |
| ; CHECK: ret |
| |
| entry: |
| br label %loop |
| |
| loop: |
| %indvar = phi i32 [ 0, %entry ], [ %i.2.0.us1534, %loop ] ; <i32> [#uses=1] |
| %i.2.0.us1534 = add i32 %indvar, 1 ; <i32> [#uses=3] |
| %tmp628.us1540 = shl i32 %i.2.0.us1534, 1 ; <i32> [#uses=1] |
| %tmp645646647.us1547 = sext i32 %tmp628.us1540 to i64 ; <i64> [#uses=1] |
| store i64 %tmp645646647.us1547, i64* null |
| %tmp611.us1535 = icmp eq i32 %i.2.0.us1534, 4 ; <i1> [#uses=2] |
| %tmp623.us1538 = select i1 %tmp611.us1535, i32 6, i32 0 ; <i32> [#uses=1] |
| store i32 %tmp623.us1538, i32* null |
| br i1 %tmp611.us1535, label %exit, label %loop |
| |
| exit: |
| ret void |
| } |
