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1; RUN: llc < %s -mtriple=i686--2; PR47533 4; This function has a sub-register reuse undone.5 6@uint8 = external dso_local global i32 ; <ptr> [#uses=3]7 8declare signext i8 @foo(i32, i8 signext) nounwind readnone9 10declare signext i8 @bar(i32, i8 signext) nounwind readnone11 12define i32 @uint80(i8 signext %p_52) nounwind {13entry:14 %0 = sext i8 %p_52 to i16 ; <i16> [#uses=1]15 %1 = tail call i32 @func_24(i16 zeroext %0, i8 signext ptrtoint (ptr @foo to i8)) nounwind; <i32> [#uses=1]16 %2 = trunc i32 %1 to i8 ; <i8> [#uses=1]17 %3 = or i8 %2, 1 ; <i8> [#uses=1]18 %4 = tail call i32 @safe(i32 1) nounwind ; <i32> [#uses=0]19 %5 = tail call i32 @func_24(i16 zeroext 0, i8 signext undef) nounwind; <i32> [#uses=1]20 %6 = trunc i32 %5 to i8 ; <i8> [#uses=1]21 %7 = xor i8 %3, %p_52 ; <i8> [#uses=1]22 %8 = xor i8 %7, %6 ; <i8> [#uses=1]23 %9 = icmp ne i8 %p_52, 0 ; <i1> [#uses=1]24 %10 = zext i1 %9 to i8 ; <i8> [#uses=1]25 %11 = tail call i32 @func_24(i16 zeroext ptrtoint (ptr @bar to i16), i8 signext %10) nounwind; <i32> [#uses=1]26 %12 = tail call i32 @func_24(i16 zeroext 0, i8 signext 1) nounwind; <i32> [#uses=0]27 br i1 undef, label %bb2, label %bb28 29bb: ; preds = %entry30 br i1 undef, label %bb2, label %bb331 32bb2: ; preds = %bb, %entry33 br label %bb334 35bb3: ; preds = %bb2, %bb36 %iftmp.2.0 = phi i32 [ 0, %bb2 ], [ 1, %bb ] ; <i32> [#uses=1]37 %13 = icmp ne i32 %11, %iftmp.2.0 ; <i1> [#uses=1]38 %14 = tail call i32 @safe(i32 -2) nounwind ; <i32> [#uses=0]39 %15 = zext i1 %13 to i8 ; <i8> [#uses=1]40 %16 = tail call signext i8 @func_53(i8 signext undef, i8 signext 1, i8 signext %15, i8 signext %8) nounwind; <i8> [#uses=0]41 br i1 undef, label %bb5, label %bb442 43bb4: ; preds = %bb344 %17 = load volatile i32, ptr @uint8, align 4 ; <i32> [#uses=0]45 br label %bb546 47bb5: ; preds = %bb4, %bb348 %18 = load volatile i32, ptr @uint8, align 4 ; <i32> [#uses=0]49 %19 = sext i8 undef to i16 ; <i16> [#uses=1]50 %20 = tail call i32 @func_24(i16 zeroext %19, i8 signext 1) nounwind; <i32> [#uses=0]51 br i1 undef, label %return, label %bb6.preheader52 53bb6.preheader: ; preds = %bb554 %21 = sext i8 %p_52 to i32 ; <i32> [#uses=1]55 %22 = load volatile i32, ptr @uint8, align 4 ; <i32> [#uses=0]56 %23 = tail call i32 (...) @safefuncts(i32 %21, i32 1) nounwind; <i32> [#uses=0]57 unreachable58 59return: ; preds = %bb560 ret i32 undef61}62 63declare i32 @func_24(i16 zeroext, i8 signext)64 65declare i32 @safe(i32)66 67declare signext i8 @func_53(i8 signext, i8 signext, i8 signext, i8 signext)68 69declare i32 @safefuncts(...)70