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path: root/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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2005-05-14LowerOperation takes a dagChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22004 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13Align doubles on 8-byte boundaries if possible.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21993 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13Add an isTailCall flag to LowerCallToChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21958 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13Emit function entry code after lowering hte arguments.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21931 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-13Allow targets to emit code into the entry block of each functionChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21930 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-12Pass calling convention to use into lower call toChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21900 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-11wrap long lineChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21870 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-09The semantics of cast X to bool are a comparison against zero, not a truncation!Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21833 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-09Add support for matching the READPORT, WRITEPORT, READIO, WRITEIO intrinsicsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21825 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-09Don't use the load/store instruction as the source pointer, use the pointerChris Lattner
being stored/loaded through! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21806 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-09wrap long linesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21804 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-05When hitting an unsupported intrinsic, actually print itChris Lattner
Lower debug info to noops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21698 91177308-0d34-0410-b5e6-96231b3b80d8
2005-05-03Implement count leading zeros (ctlz), count trailing zeros (cttz), and countAndrew Lenharth
population (ctpop). Generic lowering is implemented, however only promotion is implemented for SelectionDAG at the moment. More coming soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21676 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-30Codegen and legalize sin/cos/llvm.sqrt as FSIN/FCOS/FSQRT calls. This patchChris Lattner
was contributed by Morten Ofstad, with some minor tweaks and bug fixes added by me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21636 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-27Implement Value* tracking for loads and stores in the selection DAG. This ↵Andrew Lenharth
enables one to use alias analysis in the backends. (TRUNK)Stores and (EXT|ZEXT|SEXT)Loads have an extra SDOperand which is a SrcValueSDNode which contains the Value*. Note that if the operation is introduced by the backend, it will still have the operand, but the value* will be null. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21599 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-22Convert tabs to spacesMisha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21439 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-21Remove trailing whitespaceMisha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21420 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-12Fold shift by size larger than type size to undefNate Begeman
Make llvm undef values generate ISD::UNDEF nodes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21261 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-09Emit BRCONDTWOWAY when possible.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21167 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-02transform fabs/fabsf calls into FABS nodes.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21014 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-02Turn -0.0 - X -> fnegChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21011 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-31PCMarker support for DAG and AlphaAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20965 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-30Instead of setting up the CFG edges at selectiondag construction time, setChris Lattner
them up after the code has been emitted. This allows targets to select one mbb as multiple mbb's as needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20937 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-29Fix a bug that andrew noticed where we do not correctly sign/zero extendChris Lattner
returned integer values all of the way to 64-bits (we only did it to 32-bits leaving the top bits undefined). This causes problems for targets like alpha whose ABI's define the top bits too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20926 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-26Change interface to LowerCallTo to take a boolean isVarArg argument.Nate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20842 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-15This mega patch converts us from using Function::a{iterator|begin|end} toChris Lattner
using Function::arg_{iterator|begin|end}. Likewise Module::g* -> Module::global_*. This patch is contributed by Gabor Greif, thanks! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20597 91177308-0d34-0410-b5e6-96231b3b80d8
2005-02-17Fix compilation errors with VS 2005, patch by Aaron Gray.Misha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20231 91177308-0d34-0410-b5e6-96231b3b80d8
2005-02-17Don't sink argument loads into loops or other bad places. This disables ↵Chris Lattner
folding of argument loads with instructions that are not in the entry block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20228 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-23Adjust to changes in SelectionDAG interface.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19779 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-22Get this to work for 64-bit systems.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19763 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-19Support targets that do not use i8 shift amounts.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19707 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-18Teach legalize to promote copy(from|to)reg, instead of making the isel passChris Lattner
do it. This results in better code on X86 for floats (because if strict precision is not required, we can elide some more expensive double -> float conversions like the old isel did), and allows other targets to emit CopyFromRegs that are not legal for arguments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19668 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-18Allow setcc operations to have nonbool types.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19656 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17Non-volatile loads can be freely reordered against each other. This fixesChris Lattner
X86/reg-pressure.ll again, and allows us to do nice things in other cases. For example, we now codegen this sort of thing: int %loadload(int *%X, int* %Y) { %Z = load int* %Y %Y = load int* %X ;; load between %Z and store %Q = add int %Z, 1 store int %Q, int* %Y ret int %Y } Into this: loadload: mov %EAX, DWORD PTR [%ESP + 4] mov %EAX, DWORD PTR [%EAX] mov %ECX, DWORD PTR [%ESP + 8] inc DWORD PTR [%ECX] ret where we weren't able to form the 'inc [mem]' before. This also lets the instruction selector emit loads in any order it wants to, which can be good for register pressure as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19644 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17Don't call SelectionDAG.getRoot() directly, go through a forwarding method.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19642 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17Implement a target independent optimization to codegen arguments only intoChris Lattner
the basic block that uses them if possible. This is a big win on X86, as it lets us fold the argument loads into instructions and reduce register pressure (by not loading all of the arguments in the entry block). For this (contrived to show the optimization) testcase: int %argtest(int %A, int %B) { %X = sub int 12345, %A br label %L L: %Y = add int %X, %B ret int %Y } we used to produce: argtest: mov %ECX, DWORD PTR [%ESP + 4] mov %EAX, 12345 sub %EAX, %ECX mov %EDX, DWORD PTR [%ESP + 8] .LBBargtest_1: # L add %EAX, %EDX ret now we produce: argtest: mov %EAX, 12345 sub %EAX, DWORD PTR [%ESP + 4] .LBBargtest_1: # L add %EAX, DWORD PTR [%ESP + 8] ret This also fixes the FIXME in the code. BTW, this occurs in real code. 164.gzip shrinks from 8623 to 8608 lines of .s file. The stack frame in huft_build shrinks from 1644->1628 bytes, inflate_codes shrinks from 116->108 bytes, and inflate_block from 2620->2612, due to fewer spills. Take that alkis. :-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19639 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-17Refactor code into a new method.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19635 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16add method stubChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19612 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16Add support for promoted registers being live across blocks.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19595 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16Use the new TLI method to get this.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19582 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-16Add support for targets that require promotions.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19579 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-15Add new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19568 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-14Adjust to CopyFromReg changes, implement deletion of truncating/extendingChris Lattner
stores/loads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19562 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19535 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13Don't forget the existing root.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19531 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-13Codegen independent ops as being independent.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19528 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-12Add an option to view the selection dags as they are generated.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19498 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11add an assertion, avoid creating copyfromreg/copytoreg pairs that are theChris Lattner
same for PHI nodes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19484 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-11Turn memset/memcpy/memmove into the corresponding operations.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19463 91177308-0d34-0410-b5e6-96231b3b80d8
2005-01-09Handle static alloca arguments to PHI nodes.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19409 91177308-0d34-0410-b5e6-96231b3b80d8
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