| ; RUN: llc < %s -mtriple=thumb-apple-darwin -relocation-model=dynamic-no-pic -mcpu=cortex-a8 -asm-verbose=false | FileCheck %s |
| |
| ; We should be able to tail-duplicate the basic block containing the indirectbr |
| ; into all of its predecessors. |
| ; CHECK-LABEL: fn: |
| ; CHECK: mov pc |
| ; CHECK: mov pc |
| ; CHECK: mov pc |
| |
| @fn.codetable = internal unnamed_addr constant [3 x ptr] [ptr blockaddress(@fn, %RETURN), ptr blockaddress(@fn, %INCREMENT), ptr blockaddress(@fn, %DECREMENT)], align 4 |
| |
| define i32 @fn(ptr nocapture %opcodes) nounwind readonly ssp { |
| entry: |
| %0 = load i32, ptr %opcodes, align 4 |
| %arrayidx = getelementptr inbounds [3 x ptr], ptr @fn.codetable, i32 0, i32 %0 |
| br label %indirectgoto |
| |
| INCREMENT: ; preds = %indirectgoto |
| %inc = add nsw i32 %result.0, 1 |
| %1 = load i32, ptr %opcodes.addr.0, align 4 |
| %arrayidx2 = getelementptr inbounds [3 x ptr], ptr @fn.codetable, i32 0, i32 %1 |
| br label %indirectgoto |
| |
| DECREMENT: ; preds = %indirectgoto |
| %dec = add nsw i32 %result.0, -1 |
| %2 = load i32, ptr %opcodes.addr.0, align 4 |
| %arrayidx4 = getelementptr inbounds [3 x ptr], ptr @fn.codetable, i32 0, i32 %2 |
| br label %indirectgoto |
| |
| indirectgoto: ; preds = %DECREMENT, %INCREMENT, %entry |
| %result.0 = phi i32 [ 0, %entry ], [ %dec, %DECREMENT ], [ %inc, %INCREMENT ] |
| %opcodes.pn = phi ptr [ %opcodes, %entry ], [ %opcodes.addr.0, %DECREMENT ], [ %opcodes.addr.0, %INCREMENT ] |
| %indirect.goto.dest.in = phi ptr [ %arrayidx, %entry ], [ %arrayidx4, %DECREMENT ], [ %arrayidx2, %INCREMENT ] |
| %opcodes.addr.0 = getelementptr inbounds i32, ptr %opcodes.pn, i32 1 |
| %indirect.goto.dest = load ptr, ptr %indirect.goto.dest.in, align 4 |
| indirectbr ptr %indirect.goto.dest, [label %RETURN, label %INCREMENT, label %DECREMENT] |
| |
| RETURN: ; preds = %indirectgoto |
| ret i32 %result.0 |
| } |