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1; RUN: llc -mtriple=x86_64-- < %s | FileCheck %s2 3; LSR would like to use a single IV for both of these, however it's4; not safe due to wraparound.5 6; CHECK: addb $-4, %7; CHECK: decw %8 9@g_19 = common global i32 0 ; <ptr> [#uses=2]10 11declare i32 @func_8(i8 zeroext) nounwind12 13declare i32 @func_3(i8 signext) nounwind14 15define void @func_1() nounwind {16entry:17 br label %bb18 19bb: ; preds = %bb, %entry20 %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, ptr @g_19, align 4 ; <i32> [#uses=2]24 %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1]25 store i32 %tmp2, ptr @g_19, align 426 %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 %bb34 35return: ; preds = %bb36 ret void37}38