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2013-01-29Fix 64-bit atomic operations in Thumb mode.Tim Northover
The ARM and Thumb variants of LDREXD and STREXD have different constraints and take different operands. Previously the code expanding atomic operations didn't take this into account and asserted in Thumb mode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173780 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-25Fixed the condition codes for the atomic64 min/umin code generation on ARM. ↵Silviu Baranga
If the sutraction of the higher 32 bit parts gives a 0 result, we need to do the store operation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173437 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-19Remove some register allocation order dependencies.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172874 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-11Simplify writing floating types to assembly.Tim Northover
This removes previous special cases for each floating-point type in favour of a shared codepath. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172189 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-10Stack Alignment: throw error if we can't satisfy the minimal alignmentManman Ren
requirement when creating stack objects in MachineFrameInfo. Add CreateStackObjectWithMinAlign to throw error when the minimal alignment can't be achieved and to clamp the alignment when the preferred alignment can't be achieved. Same is true for CreateVariableSizedObject. Will not emit error in CreateSpillStackObject or CreateStackObject. As long as callers of CreateStackObject do not assume the object will be aligned at the requested alignment, we should not have miscompile since later optimizations which look at the object's alignment will have the correct information. rdar://12713765 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172027 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-09MIsched: add an ILP window property to machine model.Andrew Trick
This was an experimental option, but needs to be defined per-target. e.g. PPC A2 needs to aggressively hide latency. I converted some in-order scheduling tests to A2. Hal is working on more test cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171946 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-08Specify complete triple for fp128 tests.Tim Northover
This avoids FileCheck failing over different comment characters in assembly (notably powerpc64 on Linux vs Darwin) and should fix David's build-bot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171886 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-08Allow the asm printer to print fp128 values properly.Tim Northover
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171866 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-07Make the MergeGlobals pass correctly handle the address space qualifiers of ↵Silviu Baranga
the global variables. We partition the set of globals by their address space, and apply the same the trasnformation as before to merge them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171730 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-20Revert "Adding support for llvm.arm.neon.vaddl[su].* and"Bob Wilson
This reverts r170694. The operations can be represented in IR without adding any new intrinsics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170765 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-20Adding support for llvm.arm.neon.vaddl[su].* andRenato Golin
llvm.arm.neon.vsub[su].* intrinsics. Patch by Pete Couperus <pjcoup@gmail.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170694 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19LLVM sdisel normalize bit extraction of the form:Evan Cheng
((x & 0xff00) >> 8) << 2 to (x >> 6) & 0x3fc This is general goodness since it folds a left shift into the mask. However, the trailing zeros in the mask prevents the ARM backend from using the bit extraction instructions. And worse since the mask materialization may require an addition instruction. This comes up fairly frequently when the result of the bit twiddling is used as memory address. e.g. = ptr[(x & 0xFF0000) >> 16] We want to generate: ubfx r3, r1, #16, #8 ldr.w r3, [r0, r3, lsl #2] vs. mov.w r9, #1020 and.w r2, r9, r1, lsr #14 ldr r2, [r0, r2] Add a late ARM specific isel optimization to ARMDAGToDAGISel::PreprocessISelDAG(). It folds the left shift to the 'base + offset' address computation; change the mask to one which doesn't have trailing zeros and enable the use of ubfx. Note the optimization has to be done late since it's target specific and we don't want to change the DAG normalization. It's also fairly restrictive as shifter operands are not always free. It's only done for lsh 1 / 2. It's known to be free on some cpus and they are most common for address computation. This is a slight win for blowfish, rijndael, etc. rdar://12870177 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170581 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-18Disable ARM partial flag dependency optimization at -OzQuentin Colombet
To not over constrain the scheduler for ARM in thumb mode, some optimizations for code size reduction, specific to ARM thumb, are blocked when they add a dependency (like write after read dependency). Disables this check when code size is the priority, i.e., code is compiled with -Oz. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170462 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-18MISched: add dependence to ExitSU to model live-out latency.Andrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170454 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-10Some enhancements for memcpy / memset inline expansion.Evan Cheng
1. Teach it to use overlapping unaligned load / store to copy / set the trailing bytes. e.g. On 86, use two pairs of movups / movaps for 17 - 31 byte copies. 2. Use f64 for memcpy / memset on targets where i64 is not legal but f64 is. e.g. x86 and ARM. 3. When memcpy from a constant string, do *not* replace the load with a constant if it's not possible to materialize an integer immediate with a single instruction (required a new target hook: TLI.isIntImmLegal()). 4. Use unaligned load / stores more aggressively if target hooks indicates they are "fast". 5. Update ARM target hooks to use unaligned load / stores. e.g. vld1.8 / vst1.8. Also increase the threshold to something reasonable (8 for memset, 4 pairs for memcpy). This significantly improves Dhrystone, up to 50% on ARM iOS devices. rdar://12760078 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169791 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-07Added Mapping Symbols for ARM ELFTim Northover
Before this patch, when you objdump an LLVM-compiled file, objdump tried to decode data-in-code sections as if they were code. This patch adds the missing Mapping Symbols, as defined by "ELF for the ARM Architecture" (ARM IHI 0044D). Patch based on work by Greg Fitzgerald. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169609 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06Fix typos in CHECK lines.Dmitri Gribenko
Patch by Alexander Zinenko. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169547 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06Properly fix the tes.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169464 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06llvm/test/CodeGen/ARM/extload-knownzero.ll: Try to unbreak, to add -O0. I ↵NAKAMURA Takumi
guess Chad expects fastisel here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169463 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06[arm fast-isel] Make the fast-isel implementation of memcpy respect alignment.Chad Rosier
rdar://12821569 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169460 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06Let targets provide hooks that compute known zero and ones for any_extendEvan Cheng
and extload's. If they are implemented as zero-extend, or implicitly zero-extend, then this can enable more demanded bits optimizations. e.g. define void @foo(i16* %ptr, i32 %a) nounwind { entry: %tmp1 = icmp ult i32 %a, 100 br i1 %tmp1, label %bb1, label %bb2 bb1: %tmp2 = load i16* %ptr, align 2 br label %bb2 bb2: %tmp3 = phi i16 [ 0, %entry ], [ %tmp2, %bb1 ] %cmp = icmp ult i16 %tmp3, 24 br i1 %cmp, label %bb3, label %exit bb3: call void @bar() nounwind br label %exit exit: ret void } This compiles to the followings before: push {lr} mov r2, #0 cmp r1, #99 bhi LBB0_2 @ BB#1: @ %bb1 ldrh r2, [r0] LBB0_2: @ %bb2 uxth r0, r2 cmp r0, #23 bhi LBB0_4 @ BB#3: @ %bb3 bl _bar LBB0_4: @ %exit pop {lr} bx lr The uxth is not needed since ldrh implicitly zero-extend the high bits. With this change it's eliminated. rdar://12771555 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169459 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-04ARM custom lower ctpop for vector types. Patch by Pete Couperus.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169325 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-04Use the 'count' attribute to calculate the upper bound of an array.Bill Wendling
The count attribute is more accurate with regards to the size of an array. It also obviates the upper bound attribute in the subrange. We can also better handle an unbound array by setting the count to -1 instead of the lower bound to 1 and upper bound to 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169312 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-04Add a 'count' field to the DWARF subrange.Bill Wendling
The count field is necessary because there isn't a difference between the 'lo' and 'hi' attributes for a one-element array and a zero-element array. When the count is '0', we know that this is a zero-element array. When it's >=1, then it's a normal constant sized array. When it's -1, then the array is unbounded. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169218 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-04Stack Alignment: when creating stack objects in MachineFrameInfo, make sureManman Ren
the alignment is clamped to TargetFrameLowering.getStackAlignment if the target does not support stack realignment or the option "realign-stack" is off. This will cause miscompile if the address is treated as aligned and add is replaced with or in DAGCombine. Added a bool StackRealignable to TargetFrameLowering to check whether stack realignment is implemented for the target. Also added a bool RealignOption to MachineFrameInfo to check whether the option "realign-stack" is on. rdar://12713765 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169197 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-01Simplify REG_SEQUENCE lowering.Jakob Stoklund Olesen
The TwoAddressInstructionPass takes the machine code out of SSA form by expanding REG_SEQUENCE instructions into copies. It is no longer necessary to rewrite the registers used by a REG_SEQUENCE instruction because the new coalescer algorithm can do it now. REG_SEQUENCE is just converted to a sequence of sub-register copies now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169067 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-30Codegen failure for vmull with small vectorsSebastian Pop
Codegen was failing with an assertion because of unexpected vector operands when legalizing the selection DAG for a MUL instruction. The asserting code was legalizing multiplies for vectors of size 128 bits. It uses a custom lowering to try and detect cases where it can use a VMULL instruction instead of a VMOVL + VMUL. The code was looking for input operands to the MUL that had been sign or zero extended. If it found the extended operands it would drop the sign/zero extension and use the original vector size as input to a VMULL instruction. The code assumed that the original input vector was 64 bits so that after dropping the extension it would fit directly into a D register and could be used as an operand of a VMULL instruction. The input code that trigger the failure used a vector of <4 x i8> that was sign extended to <4 x i32>. It was not safe to drop the sign extension in this case because the original vector is only 32 bits wide. The fix is to insert a sign extension for the vector to reach the required 64 bit size. In this particular example, the vector would need to be sign extented to a <4 x i16>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169024 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Handle the situation where CodeGenPrepare removes a reference to a BB that hasBill Wendling
the last invoke instruction in the function. This also removes the last landing pad in an function. This is fine, but with SjLj EH code, we've already placed a bunch of code in the 'entry' block, which expects the landing pad to stick around. When we get to the situation where CGP has removed the last landing pad, go ahead and nuke the SjLj instructions from the 'entry' block. <rdar://problem/12721258> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168930 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Added atomic 64 min/max/umin/umax instrinsics support in the ARM backend.Silviu Baranga
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168886 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-29Avoid rewriting instructions twice.Jakob Stoklund Olesen
This could cause miscompilations in targets where sub-register composition is not always idempotent (ARM). <rdar://problem/12758887> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168837 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-28ARM: Implement CanLowerReturn so large vectors get expanded into sret.Benjamin Kramer
Fixes 14337. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168809 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Add -verify-machineinstrs to these fast-isel test cases.Chad Rosier
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168723 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27CSE: allow PerformTrivialCoalescing to check copies across basic blockManman Ren
boundaries. Given the following case: BB0 %vreg1<def> = SUBrr %vreg0, %vreg7 %vreg2<def> = COPY %vreg7 BB1 %vreg10<def> = SUBrr %vreg0, %vreg2 We should be able to CSE between SUBrr in BB0 and SUBrr in BB1. rdar://12462006 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168717 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Never use .lcomm on platforms where it does not accept an alignmentUlrich Weigand
argument. Instead, use a pair of .local and .comm directives. This avoids spurious differences between binaries built by the integrated assembler vs. those built by the external assembler, since the external assembler may impose alignment requirements on .lcomm symbols where the integrated assembler does not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168704 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27Extend test case for r168657.Chad Rosier
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168658 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-20Fix physical register liveness calculations:Tim Northover
+ Take account of clobbers + Give outputs priority over inputs since they happen later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168360 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-19Factor out type info emission into separate routine.Anton Korobeynikov
It turned out that ARM wants different layout of type infos. This is yet another patch in attempt to fix PR7187 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168325 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-17Mark FP_EXTEND form v2f32 to v2f64 as "expand" for ARM NEON. Patch by Pete ↵Eli Friedman
Couperus. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168240 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-17[fast-isel] Add the -verify-machineinstrs to these test cases. The remainingChad Rosier
test cases require fixes to fast-isel before the verifier can be enabled. Part of rdar://12594152 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168233 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-16Remove hard coded registers in ARM ldrexd and strexd instructionsWeiming Zhao
This patch replaces the hard coded GPR pair [R0, R1] of Intrinsic:arm_ldrexd and [R2, R3] of Intrinsic:arm_strexd with even/odd GPRPair reg class. Similar to the lowering of atomic_64 operation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168207 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-16Make sure FABS on v2f32 and v4f32 is legal on ARM NEONAnton Korobeynikov
This fixes PR14359 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168200 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-15Mark FP_ROUND for converting NEON v2f64 to v2f32 as expand. Add a missingEli Friedman
case to vector legalization so this actually works. Patch by Pete Couperus. Fixes PR12540. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168107 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-14The code pattern "imm0_255_neg" is used for checking if an immediate value ↵Nadav Rotem
is a small negative number. This patch changes the definition of negative from -0..-255 to -1..-255. I am changing this because of a bug that we had in some of the patterns that assumed that "subs" of zero does not set the carry flag. rdar://12028498 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167963 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-14Fix really stupid ARM EHABI info generation bug: we should not emitAnton Korobeynikov
eh table and handler data if there are no landing pads in the function. Patch by Logan Chien with some cleanups from me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167945 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-14Use TARGET2 relocation for TType references on ARM.Anton Korobeynikov
Do some cleanup of the code while here. Inspired by patch by Logan Chien! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167904 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-13Cleanup the main RegisterCoalescer loop.Andrew Trick
Block priorities still apply outside loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167793 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-12misched: Infrastructure for weak DAG edges.Andrew Trick
This adds support for weak DAG edges to the general scheduling infrastructure in preparation for MachineScheduler support for heuristics based on weak edges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167738 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-10Disable the Thumb no-return call optimization:Evan Cheng
mov lr, pc b.w _foo The "mov" instruction doesn't set bit zero to one, it's putting incorrect value in lr. It messes up backtraces. rdar://12663632 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167657 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-08Recommit modified r167540.Amara Emerson
Improve ARM build attribute emission for architectures types. This also changes the default architecture emitted for a generic CPU to "v7". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167574 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-02Vext Lowering was missing opportunitiesQuentin Colombet
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167318 91177308-0d34-0410-b5e6-96231b3b80d8
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