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2011-05-16Don't do tail calls in a function that call setjmp. The stack might beRafael Espindola
corrupted when setjmp returns again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131399 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-14Fix a FIXME by moving the fast-isel implementation of the objectsize ↵Eli Friedman
intrinsic from the x86 code to the generic code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131332 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-13Make codegen able to handle values of empty types. This is one wayRafael Espindola
to fix PR9900. I will keep it open until sable is able to comment on it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131294 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-13Since I can't reproduce the failures from 131261, re-trying with aStuart Hastings
simplified version. <rdar://problem/9298790> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131274 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-13Revert 131266 and 131261 due to buildbot complaints.Stuart Hastings
rdar://problem/9298790 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131269 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-12Non-fast-isel followup to 129634; correctly handle branches controlledStuart Hastings
by non-CMP expressions. The executable test case (129821) would test this as well, if we had an "-O0 -disable-arm-fast-isel" LLVM-GCC tester. Alas, the ARM assembly would be very difficult to check with FileCheck. The thumb2-cbnz.ll test is affected; it generates larger code (tst.w vs. cmp #0), but I believe the new version is correct. rdar://problem/9298790 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131261 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-11Fixes a bug in the DAGCombiner. LoadSDNodes have two values (data, chain).Nadav Rotem
If there is a store after the load node, then there is a chain, which means that there is another user. Thus, asking hasOneUser would fail. Instead we ask hasNUsesOfValue on the 'data' value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131183 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-11Give the 'eh.sjlj.dispatchsetup' intrinsic call the value coming from the setjmpBill Wendling
intrinsic call. This prevents it from being reordered so that it appears *before* the setjmp intrinsic (thus making it completely useless). <rdar://problem/9409683> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131174 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Disable my little CopyToReg argument hack with fast-isel. ↵Eli Friedman
rdar://problem/9413587 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131156 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-10Correctly walk through nested and adjacent CALLSEQ_START nodes. NoStuart Hastings
test case; I've only seen this on a release branch, and I can't get it to reproduce on trunk. rdar://problem/7662569 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131152 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-09Look through struct wrapped types for inline asm statments.Eric Christopher
Patch by Evan Cheng. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131093 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-09Indent properly, no functionality change.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131082 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-0680 col violations.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131015 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Make the logic for determining function alignment more explicit. No ↵Eli Friedman
functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131012 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-06Use array_lengthof. No functional change.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131008 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Allow FastISel of three-register-operand instructions.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130934 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Avoid extra vreg copies for arguments passed in registers. Specifically, ↵Eli Friedman
this can make MachineCSE more effective in some cases (especially in small functions). PR8361 / part of rdar://problem/8259436 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130928 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-05Small syntax cleanup; we don't need to #define constants in C++. No ↵Eli Friedman
functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130926 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-02Other parts of the SelectionDAG framework assume that targets use their ↵Owen Anderson
pointer type for vector indices. Make the vector unrolling code respect that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130733 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-29Make FastEmit_ri_ try a bit harder to succeed for supported operations; ↵Eli Friedman
FastEmit_i can fail for non-Thumb2 ARM. Makes ARMSimplifyAddress work correctly, and reduces the number of fast-isel bailouts on non-Thumb ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130560 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-28Fix a silly mistake in r130338.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130360 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27Make the fast-isel code for literal 0.0 a bit shorter/faster, since 0.0 is ↵Eli Friedman
common. rdar://problem/9303592 . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130338 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-27Remove unused function.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130337 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-26Be careful about scheduling nodes above previous calls. It increase usages ofEvan Cheng
more callee-saved registers and introduce copies. Only allows it if scheduling a node above calls would end up lessen register pressure. Call operands also has added ABI restrictions for register allocation, so be extra careful with hoisting them above calls. rdar://9329627 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130245 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-26Fast-isel support for simple inline asms.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130205 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-26Fix typoEvan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130190 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-25A dbg.declare may not be in entry block, even if it is referring to an ↵Devang Patel
incoming argument. However, It is appropriate to emit DBG_VALUE referring to this incoming argument in entry block in MachineFunction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130129 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-23Remove unused STL header includes.Jay Foad
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130068 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-22Teach FastISel to deal with instructions that have two immediate operands.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130033 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-22Recommit the fix for rdar://9289512 with a couple tweaks toChris Lattner
fix bugs exposed by the gcc dejagnu testsuite: 1. The load may actually be used by a dead instruction, which would cause an assert. 2. The load may not be used by the current chain of instructions, and we could move it past a side-effecting instruction. Change how we process uses to define the problem away. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130018 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-22DAGCombine: fold "(zext x) == C" into "x == (trunc C)" if the trunc is lossless.Benjamin Kramer
On x86 this allows to fold a load into the cmp, greatly reducing register pressure. movzbl (%rdi), %eax cmpl $47, %eax -> cmpb $47, (%rdi) This shaves 8k off gcc.o on i386. I'll leave applying the patch in README.txt to Chris :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130005 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-21Revert r1296656, "Fix rdar://9289512 - not folding load into compare at -O0...",Daniel Dunbar
which broke a couple GCC test suite tests at -O0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129914 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-20Rewrite the expander for umulo/smulo to remember to sign extend the inputEric Christopher
manually and pass all (now) 4 arguments to the mul libcall. Add a new ExpandLibCall for just this (copied gratuitously from type legalization). Fixes rdar://9292577 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129842 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-19Delete unnecessary variable. <rdar://problem/7662569>Stuart Hastings
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129796 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-19SelectBasicBlock is rather slow even when it doesn't do anything; skip theEli Friedman
unnecessary work where possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129763 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-19Support nested CALLSEQ_BEGIN/END; necessary for ARM byval support. ↵Stuart Hastings
<rdar://problem/7662569> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129761 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-19Implement support for x86 fastisel of small fixed-sized memcpys, which are ↵Chris Lattner
generated en-mass for C++ PODs. On my c++ test file, this cuts the fast isel rejects by 10x and shrinks the generated .s file by 5% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129755 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-18while we're at it, handle 'sdiv exact' of a power of 2 also,Chris Lattner
this fixes a few rejects on c++ iterator loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129694 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-18fix rdar://9297011 - udiv by power of two causing fast-isel rejectsChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129693 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-171. merge fast-isel-shift-imm.ll into fast-isel-x86-64.llChris Lattner
2. implement rdar://9289501 - fast isel should fold trivial multiplies to shifts 3. teach tblgen to handle shift immediates that are different sizes than the shifted operands, eliminating some code from the X86 fast isel backend. 4. Have FastISel::SelectBinaryOp use (the poorly named) FastEmit_ri_ function instead of FastEmit_ri to simplify code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129666 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-17fix an oversight which caused us to compile the testcase (and otherChris Lattner
less trivial things) into a dummy lea. Before we generated: _test: ## @test movq _G@GOTPCREL(%rip), %rax leaq (%rax), %rax ret now we produce: _test: ## @test movq _G@GOTPCREL(%rip), %rax ret This is part of rdar://9289558 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129662 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-17Fix rdar://9289512 - not folding load into compare at -O0Chris Lattner
The basic issue here is that bottom-up isel is matching the branch and compare, and was failing to fold the load into the branch/compare combo. Fixing this (by allowing folding into any instruction of a sequence that is selected) allows us to produce things like: cmpb $0, 52(%rax) je LBB4_2 instead of: movb 52(%rax), %cl cmpb $0, %cl je LBB4_2 This makes the generated -O0 code run a bit faster, but also speeds up compile time by putting less pressure on the register allocator and generating less code. This was one of the biggest classes of missing load folding. Implementing this shrinks 176.gcc's c-decl.s (as a random example) by about 4% in (verbose-asm) line count. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129656 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-17split a complex predicate out to a helper function. Simplify two for loops,Chris Lattner
which don't need to check for falling off the end of a block *and* end of phi nodes, since terminators are never phis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129655 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-17fix rdar://9289583 - fast isel should handle non-canonical commutative binopsChris Lattner
allowing us to fold the immediate into the 'and' in this case: int test1(int i) { return 8&i; } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129653 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-16PR9055: extend the fix to PR4050 (r70179) to apply to zext and anyext.Eli Friedman
Returning a new node makes the code try to replace the old node, which in the included testcase is killed by CSE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129650 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-16Fix divmod libcall lowering. Convert to {S|U}DIVREM first and then expand ↵Evan Cheng
the node to a libcall. rdar://9280991 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129633 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15Fix a ton of comment typos found by codespell. Patch byChris Lattner
Luis Felipe Strano Moraes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14Fix another instance of the DAG combiner not using the correct type for the ↵Owen Anderson
RHS of a shift. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129522 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14In the pre-RA scheduler, maintain cmp+br proximity.Andrew Trick
This is done by pushing physical register definitions close to their use, which happens to handle flag definitions if they're not glued to the branch. This seems to be generally a good thing though, so I didn't need to add a target hook yet. The primary motivation is to generate code closer to what people expect and rule out missed opportunity from enabling macro-op fusion. As a side benefit, we get several 2-5% gains on x86 benchmarks. There is one regression: SingleSource/Benchmarks/Shootout/lists slows down be -10%. But this is an independent scheduler bug that will be tracked separately. See rdar://problem/9283108. Incidentally, pre-RA scheduling is only half the solution. Fixing the later passes is tracked by: <rdar://problem/8932804> [pre-RA-sched] on x86, attempt to schedule CMP/TEST adjacent with condition jump Fixes: <rdar://problem/9262453> Scheduler unnecessary break of cmp/jump fusion git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129508 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14sink a call into its only use.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129503 91177308-0d34-0410-b5e6-96231b3b80d8
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