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[LLVMdev] ARM backend playing with alternative jump table implementations
2009 Feb 17
1
[LLVMdev] ARM backend playing with alternative jump table implementations
...e section. Currently the idiom for jump tables loooks like this // .set PCRELV0, (.LJTI9_0_0-(.LPCRELL0+8)) // .LPCRELL0: // add r3, pc, #PCRELV0 // ldr pc, [r3, +r0, lsl #2] // .LJTI9_0_0: // .long .LBB9_2 // .long .LBB9_5 // .long .LBB9_7 // .long .LBB9_4 // .long .LBB9_8 I would like to be able to change this to something like: ldr r3, .POOL_ADDR ldr pc, [r3, +r0, lsl #2 .POOL_ADDR: .text .LJTI9_0_0: .data .LJTI9_0_0: .long .LBB9_2 .l...
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
2009 Jun 03
5
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
...ming for looks somthing like this: + // + // .set PCRELV0, (.LJTI9_0_0-(.LPCRELL0+8)) + // .LPCRELL0: + // add r3, pc, #PCRELV0 + // ldr pc, [r3, +r0, lsl #2] + // .LJTI9_0_0: + // .long .LBB9_2 + // .long .LBB9_5 + // .long .LBB9_7 + // .long .LBB9_4 + // .long .LBB9_8 + // + // In pic mode the table entries are relative to table beginning + // requiring and extra addition + // + // The code generation logic for ARMISD::BR_JT will also + // emit the table (c.f. ARMAsmPrinter::printJTBlockOperan...
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
2009 Jun 11
0
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
On Jun 8, 2009, at 2:42 PM, robert muth wrote: > On Sun, Jun 7, 2009 at 11:53 PM, Evan Cheng <evan.cheng at apple.com> > wrote: >> >> On Jun 7, 2009, at 6:59 AM, robert muth wrote: >> >>> On Sat, Jun 6, 2009 at 4:51 PM, Evan Cheng<evan.cheng at apple.com> >>> wrote: >>>> +cl::opt<std::string>
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
2009 Jun 08
2
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
On Sun, Jun 7, 2009 at 11:53 PM, Evan Cheng <evan.cheng at apple.com> wrote: > > On Jun 7, 2009, at 6:59 AM, robert muth wrote: > >> On Sat, Jun 6, 2009 at 4:51 PM, Evan Cheng<evan.cheng at apple.com> >> wrote: >>> +cl::opt<std::string> FlagJumpTableSection("jumptable-section", >>> +                                          
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
2009 Jun 24
2
[LLVMdev] patch for llc/ARM: added mechanism to move switch tables from .text -> .data; also cleanup and documentation
...ming for looks somthing like this: + // + // .set PCRELV0, (.LJTI9_0_0-(.LPCRELL0+8)) + // .LPCRELL0: + // add r3, pc, #PCRELV0 + // ldr pc, [r3, +r0, lsl #2] + // .LJTI9_0_0: + // .long .LBB9_2 + // .long .LBB9_5 + // .long .LBB9_7 + // .long .LBB9_4 + // .long .LBB9_8 + // + // In pic mode the table entries are relative to table beginning + // requiring and extra addition + // + // The code generation logic for ARMISD::BR_JT will also + // emit the table (c.f. ARMAsmPrinter::printJTBlockOperan...