llvm/lib/Target/PowerPC, branch stable

Fix a bad assert in PPCTargetLowering

2013-04-01T18:42:58Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178489 91177308-0d34-0410-b5e6-96231b3b80d8

Add more PPC floating-point conversion instructions

2013-04-01T17:52:07Z

The P7 and A2 have additional floating-point conversion instructions which allow a direct two-instruction sequence (plus load/store) to convert from all combinations (signed/unsigned i32/i64) <--> (float/double) (on previous cores, only some combinations were directly available). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178480 91177308-0d34-0410-b5e6-96231b3b80d8

Use ImmToIdxMap.count in PPCRegisterInfo

2013-04-01T17:02:06Z

Code improvement suggested by Jakob (in review of r178450). No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178473 91177308-0d34-0410-b5e6-96231b3b80d8

Add the PPC popcntw instruction

2013-04-01T15:58:15Z

The popcntw instruction is available whenever the popcntd instruction is available, and performs a separate popcnt on the lower and upper 32-bits. Ignoring the high-order count, this can be used for the 32-bit input case (saving on the explicit zero extension otherwise required to use popcntd). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178470 91177308-0d34-0410-b5e6-96231b3b80d8

Treat PPCISD::STFIWX like the memory opcode that it is

2013-04-01T15:37:53Z

PPCISD::STFIWX is really a memory opcode, and so it should come after FIRST_TARGET_MEMORY_OPCODE, and we should use DAG.getMemIntrinsicNode to create nodes using it. No functionality change intended (although there could be optimization benefits from preserving the MMO information). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178468 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup ImmToIdxMap and noImmForm in PPCRegisterInfo

2013-03-31T14:43:31Z

ImmToIdxMap should be a DenseMap (not a std::map) because there is no ordering requirement. Also, we don't need a separate list of instructions for noImmForm in eliminateFrameIndex, because this list is essentially the complement of the keys in ImmToIdxMap. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178450 91177308-0d34-0410-b5e6-96231b3b80d8

Add the PPC lfiwax instruction

2013-03-31T10:12:51Z

This instruction is available on modern PPC64 CPUs, and is now used to improve the SINT_TO_FP lowering (by eliminating the need for the separate sign extension instruction and decreasing the amount of needed stack space). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178446 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup PPC(64) i32 -> float/double conversion

2013-03-31T01:58:02Z

The existing SINT_TO_FP code for i32 -> float/double conversion was disabled because it relied on broken EXTSW_32/STD_32 instruction definitions. The original intent had been to enable these 64-bit instructions to be used on CPUs that support them even in 32-bit mode. Unfortunately, this form of lying to the infrastructure was buggy (as explained in the FIXME comment) and had therefore been disabled. This re-enables this functionality, using regular DAG nodes, but only when compiling in 64-bit mode. The old STD_32/EXTSW_32 definitions (which were dead) are removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178438 91177308-0d34-0410-b5e6-96231b3b80d8

Implement FRINT lowering on PPC using frin

2013-03-29T19:41:55Z

Like nearbyint, rint can be implemented on PPC using the frin instruction. The complication comes from the fact that rint needs to set the FE_INEXACT flag when the result does not equal the input value (and frin does not do that). As a result, we use a custom inserter which, after the rounding, compares the rounded value with the original, and if they differ, explicitly sets the XX bit in the FPSCR register (which corresponds to FE_INEXACT). Once LLVM has better modeling of the floating-point environment we should be able to (often) eliminate this extra complexity. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178362 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the old CodePlacementOpt pass.

2013-03-29T17:14:24Z

It was superseded by MachineBlockPlacement and disabled by default since LLVM 3.1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178349 91177308-0d34-0410-b5e6-96231b3b80d8