1 ; RUN: llc -march=x86 < %s | FileCheck %s 2 3 ; The comparison happens after the relevant use, so the stride can easily 4 ; be changed. The comparison can be done in a narrower mode than the 5 ; induction variable. 6 ; TODO: By making the first store post-increment as well, the loop setup 7 ; could be made simpler. 8 9 define void @foo() nounwind { 10 ; CHECK-LABEL: foo: 11 ; CHECK-NOT: ret 12 ; CHECK: cmpl $10 13 ; CHECK: ret 14 15 entry: 16 br label %loop 17 18 loop: 19 %indvar = phi i32 [ 0, %entry ], [ %i.2.0.us1534, %loop ] ; <i32> [#uses=1] 20 %i.2.0.us1534 = add i32 %indvar, 1 ; <i32> [#uses=3] 21 %tmp628.us1540 = shl i32 %i.2.0.us1534, 1 ; <i32> [#uses=1] 22 %tmp645646647.us1547 = sext i32 %tmp628.us1540 to i64 ; <i64> [#uses=1] 23 store i64 %tmp645646647.us1547, i64* null 24 %tmp611.us1535 = icmp eq i32 %i.2.0.us1534, 4 ; <i1> [#uses=2] 25 %tmp623.us1538 = select i1 %tmp611.us1535, i32 6, i32 0 ; <i32> [#uses=1] 26 store i32 %tmp623.us1538, i32* null 27 br i1 %tmp611.us1535, label %exit, label %loop 28 29 exit: 30 ret void 31 } 32
