1 ; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=dynamic-no-pic -mcpu=cortex-a8 -asm-verbose=false | FileCheck %s 2 3 ; We should be able to tail-duplicate the basic block containing the indirectbr 4 ; into all of its predecessors. 5 ; CHECK-LABEL: fn: 6 ; CHECK: mov pc 7 ; CHECK: mov pc 8 ; CHECK: mov pc 9 10 @fn.codetable = internal unnamed_addr constant [3 x i8*] [i8* blockaddress(@fn, %RETURN), i8* blockaddress(@fn, %INCREMENT), i8* blockaddress(@fn, %DECREMENT)], align 4 11 12 define i32 @fn(i32* nocapture %opcodes) nounwind readonly ssp { 13 entry: 14 %0 = load i32* %opcodes, align 4 15 %arrayidx = getelementptr inbounds [3 x i8*]* @fn.codetable, i32 0, i32 %0 16 br label %indirectgoto 17 18 INCREMENT: ; preds = %indirectgoto 19 %inc = add nsw i32 %result.0, 1 20 %1 = load i32* %opcodes.addr.0, align 4 21 %arrayidx2 = getelementptr inbounds [3 x i8*]* @fn.codetable, i32 0, i32 %1 22 br label %indirectgoto 23 24 DECREMENT: ; preds = %indirectgoto 25 %dec = add nsw i32 %result.0, -1 26 %2 = load i32* %opcodes.addr.0, align 4 27 %arrayidx4 = getelementptr inbounds [3 x i8*]* @fn.codetable, i32 0, i32 %2 28 br label %indirectgoto 29 30 indirectgoto: ; preds = %DECREMENT, %INCREMENT, %entry 31 %result.0 = phi i32 [ 0, %entry ], [ %dec, %DECREMENT ], [ %inc, %INCREMENT ] 32 %opcodes.pn = phi i32* [ %opcodes, %entry ], [ %opcodes.addr.0, %DECREMENT ], [ %opcodes.addr.0, %INCREMENT ] 33 %indirect.goto.dest.in = phi i8** [ %arrayidx, %entry ], [ %arrayidx4, %DECREMENT ], [ %arrayidx2, %INCREMENT ] 34 %opcodes.addr.0 = getelementptr inbounds i32* %opcodes.pn, i32 1 35 %indirect.goto.dest = load i8** %indirect.goto.dest.in, align 4 36 indirectbr i8* %indirect.goto.dest, [label %RETURN, label %INCREMENT, label %DECREMENT] 37 38 RETURN: ; preds = %indirectgoto 39 ret i32 %result.0 40 } 41
