1 ; RUN: llc < %s > %t 2 ; PR6300 3 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32" 4 target triple = "i386-pc-linux-gnu" 5 6 ; When the "154" loops back onto itself, it defines a register after using it. 7 ; The first value of the register is implicit-def. 8 9 %"struct location_chain_def" = type { %"struct location_chain_def"*, %"struct rtx_def"*, %"struct rtx_def"*, i32 } 10 %"struct real_value" = type { i32, [5 x i32] } 11 %"struct rtx_def" = type { i16, i8, i8, %"union u" } 12 %"union u" = type { %"struct real_value" } 13 14 define i32 @variable_union(i8** nocapture %slot, i8* nocapture %data) nounwind { 15 entry: 16 br i1 undef, label %"4.thread", label %"3" 17 18 "4.thread": ; preds = %entry 19 unreachable 20 21 "3": ; preds = %entry 22 br i1 undef, label %"19", label %"20" 23 24 "19": ; preds = %"3" 25 unreachable 26 27 "20": ; preds = %"3" 28 br i1 undef, label %"56.preheader", label %dv_onepart_p.exit 29 30 dv_onepart_p.exit: ; preds = %"20" 31 unreachable 32 33 "56.preheader": ; preds = %"20" 34 br label %"56" 35 36 "50": ; preds = %"57" 37 br label %"56" 38 39 "56": ; preds = %"50", %"56.preheader" 40 br i1 undef, label %"57", label %"58" 41 42 "57": ; preds = %"56" 43 br i1 undef, label %"50", label %"58" 44 45 "58": ; preds = %"57", %"56" 46 br i1 undef, label %"62", label %"63" 47 48 "62": ; preds = %"58" 49 unreachable 50 51 "63": ; preds = %"58" 52 br i1 undef, label %"67", label %"66" 53 54 "66": ; preds = %"63" 55 br label %"67" 56 57 "67": ; preds = %"66", %"63" 58 br label %"68" 59 60 "68": ; preds = %"161", %"67" 61 br i1 undef, label %"153", label %"161" 62 63 "153": ; preds = %"68" 64 br i1 undef, label %"160", label %bb.nph46 65 66 bb.nph46: ; preds = %"153" 67 br label %"154" 68 69 "154": ; preds = %"154", %bb.nph46 70 %0 = phi %"struct location_chain_def"** [ undef, %bb.nph46 ], [ %1, %"154" ] ; <%"struct location_chain_def"**> [#uses=1] 71 %1 = bitcast i8* undef to %"struct location_chain_def"** ; <%"struct location_chain_def"**> [#uses=1] 72 store %"struct location_chain_def"* undef, %"struct location_chain_def"** %0, align 4 73 br i1 undef, label %"160", label %"154" 74 75 "160": ; preds = %"154", %"153" 76 br label %"161" 77 78 "161": ; preds = %"160", %"68" 79 br label %"68" 80 } 81
