1 ; RUN: llc -march=x86-64 < %s | FileCheck %s 2 3 ; LSR would like to use a single IV for both of these, however it's 4 ; not safe due to wraparound. 5 6 ; CHECK: addb $-4, % 7 ; CHECK: decw % 8 9 @g_19 = common global i32 0 ; <i32*> [#uses=2] 10 11 declare i32 @func_8(i8 zeroext) nounwind 12 13 declare i32 @func_3(i8 signext) nounwind 14 15 define void @func_1() nounwind { 16 entry: 17 br label %bb 18 19 bb: ; preds = %bb, %entry 20 %indvar = phi i16 [ 0, %entry ], [ %indvar.next, %bb ] ; <i16> [#uses=2] 21 %tmp = sub i16 0, %indvar ; <i16> [#uses=1] 22 %tmp27 = trunc i16 %tmp to i8 ; <i8> [#uses=1] 23 %tmp1 = load i32, i32* @g_19, align 4 ; <i32> [#uses=2] 24 %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1] 25 store i32 %tmp2, i32* @g_19, align 4 26 %tmp3 = trunc i32 %tmp1 to i8 ; <i8> [#uses=1] 27 %tmp4 = tail call i32 @func_8(i8 zeroext %tmp3) nounwind ; <i32> [#uses=0] 28 %tmp5 = shl i8 %tmp27, 2 ; <i8> [#uses=1] 29 %tmp6 = add i8 %tmp5, -112 ; <i8> [#uses=1] 30 %tmp7 = tail call i32 @func_3(i8 signext %tmp6) nounwind ; <i32> [#uses=0] 31 %indvar.next = add i16 %indvar, 1 ; <i16> [#uses=2] 32 %exitcond = icmp eq i16 %indvar.next, -28 ; <i1> [#uses=1] 33 br i1 %exitcond, label %return, label %bb 34 35 return: ; preds = %bb 36 ret void 37 } 38
