llvm-6502/test/CodeGen/ARM/tail-dup.ll
Manman Ren 2dc50d3067 TBAA: remove !tbaa from testing cases if not used.
This will make it easier to turn on struct-path aware TBAA since the metadata
format will change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180796 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30 17:52:57 +00:00

41 lines
1.9 KiB
LLVM

; 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: fn:
; CHECK: mov pc
; CHECK: mov pc
; CHECK: mov pc
@fn.codetable = internal unnamed_addr constant [3 x i8*] [i8* blockaddress(@fn, %RETURN), i8* blockaddress(@fn, %INCREMENT), i8* blockaddress(@fn, %DECREMENT)], align 4
define i32 @fn(i32* nocapture %opcodes) nounwind readonly ssp {
entry:
%0 = load i32* %opcodes, align 4
%arrayidx = getelementptr inbounds [3 x i8*]* @fn.codetable, i32 0, i32 %0
br label %indirectgoto
INCREMENT: ; preds = %indirectgoto
%inc = add nsw i32 %result.0, 1
%1 = load i32* %opcodes.addr.0, align 4
%arrayidx2 = getelementptr inbounds [3 x i8*]* @fn.codetable, i32 0, i32 %1
br label %indirectgoto
DECREMENT: ; preds = %indirectgoto
%dec = add nsw i32 %result.0, -1
%2 = load i32* %opcodes.addr.0, align 4
%arrayidx4 = getelementptr inbounds [3 x i8*]* @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 i32* [ %opcodes, %entry ], [ %opcodes.addr.0, %DECREMENT ], [ %opcodes.addr.0, %INCREMENT ]
%indirect.goto.dest.in = phi i8** [ %arrayidx, %entry ], [ %arrayidx4, %DECREMENT ], [ %arrayidx2, %INCREMENT ]
%opcodes.addr.0 = getelementptr inbounds i32* %opcodes.pn, i32 1
%indirect.goto.dest = load i8** %indirect.goto.dest.in, align 4
indirectbr i8* %indirect.goto.dest, [label %RETURN, label %INCREMENT, label %DECREMENT]
RETURN: ; preds = %indirectgoto
ret i32 %result.0
}