| Dan Gohman | 0a06310 | 2009-09-08 23:54:48 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86 |
| Jakob Stoklund Olesen | bf1c255 | 2009-08-23 13:01:45 +0000 | [diff] [blame] | 2 | ; PR4753 |
| 3 | |
| 4 | ; This function has a sub-register reuse undone. |
| 5 | |
| 6 | @uint8 = external global i32 ; <i32*> [#uses=3] |
| 7 | |
| 8 | declare signext i8 @foo(i32, i8 signext) nounwind readnone |
| 9 | |
| 10 | declare signext i8 @bar(i32, i8 signext) nounwind readnone |
| 11 | |
| 12 | define i32 @uint80(i8 signext %p_52) nounwind { |
| 13 | entry: |
| 14 | %0 = sext i8 %p_52 to i16 ; <i16> [#uses=1] |
| 15 | %1 = tail call i32 @func_24(i16 zeroext %0, i8 signext ptrtoint (i8 (i32, i8)* @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 (i8 (i32, i8)* @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 %bb |
| 28 | |
| 29 | bb: ; preds = %entry |
| 30 | br i1 undef, label %bb2, label %bb3 |
| 31 | |
| 32 | bb2: ; preds = %bb, %entry |
| 33 | br label %bb3 |
| 34 | |
| 35 | bb3: ; preds = %bb2, %bb |
| 36 | %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 %bb4 |
| 42 | |
| 43 | bb4: ; preds = %bb3 |
| 44 | %17 = volatile load i32* @uint8, align 4 ; <i32> [#uses=0] |
| 45 | br label %bb5 |
| 46 | |
| 47 | bb5: ; preds = %bb4, %bb3 |
| 48 | %18 = volatile load i32* @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.preheader |
| 52 | |
| 53 | bb6.preheader: ; preds = %bb5 |
| 54 | %21 = sext i8 %p_52 to i32 ; <i32> [#uses=1] |
| 55 | %22 = volatile load i32* @uint8, align 4 ; <i32> [#uses=0] |
| 56 | %23 = tail call i32 (...)* @safefuncts(i32 %21, i32 1) nounwind; <i32> [#uses=0] |
| 57 | unreachable |
| 58 | |
| 59 | return: ; preds = %bb5 |
| 60 | ret i32 undef |
| 61 | } |
| 62 | |
| 63 | declare i32 @func_24(i16 zeroext, i8 signext) |
| 64 | |
| 65 | declare i32 @safe(i32) |
| 66 | |
| 67 | declare signext i8 @func_53(i8 signext, i8 signext, i8 signext, i8 signext) |
| 68 | |
| 69 | declare i32 @safefuncts(...) |