When set, this bit indicates that a register is completely defined by
the value of its sub-registers.
Use the CoveredBySubRegs property to infer which super-registers are
call-preserved given a list of callee-saved registers. For example, the
ARM registers D8-D15 are callee-saved. This now automatically implies
that Q4-Q7 are call-preserved.
Conversely, Win64 callees save XMM6-XMM15, but the corresponding
YMM6-YMM15 registers are not call-preserved because they are not fully
defined by their sub-registers.
llvm-svn: 148363
Targets can now add CalleeSavedRegs defs to their *CallingConv.td file.
TableGen will use this to create a *_SaveList array suitable for
returning from getCalleeSavedRegs() as well as a *_RegMask bit mask
suitable for returning from getCallPreservedMask().
llvm-svn: 148346
(This time I believe I've checked all the -Wreturn-type warnings from GCC & added the couple of llvm_unreachables necessary to silence them. If I've missed any, I'll happily fix them as soon as I know about them)
llvm-svn: 148262
/// FastEmit_f - This method is called by target-independent code
/// to request that an instruction with the given type, opcode, and
/// floating-point immediate operand be emitted.
virtual unsigned FastEmit_f(MVT VT,
MVT RetVT,
unsigned Opcode,
const ConstantFP *FPImm);
Currently, it emits an accidentally overloaded version without the const on the
ConstantFP*. This doesn't affect anything in the tree, since nothing causes that
method to be autogenerated, but I have been playing with some ARM TableGen
refactorings that hit this problem.
llvm-svn: 147727
Use information computed while inferring new register classes to emit
accurate, table-driven implementations of getMatchingSuperRegClass().
Delete the old manual, error-prone implementations in the targets.
llvm-svn: 146873
Teach TableGen to create the missing register classes needed for
getMatchingSuperRegClass() to return maximal results. The function is
still not auto-generated, so it still returns inexact results.
This produces these new register classes:
ARM:
QQPR_with_dsub_0_in_DPR_8
QQQQPR_with_dsub_0_in_DPR_8
X86:
GR64_with_sub_32bit_in_GR32_NOAX
GR64_with_sub_32bit_in_GR32_NOAX_and_GR32_NOSP
GR64_with_sub_16bit_in_GR16_NOREX
GR64_with_sub_32bit_in_GR32_NOAX_and_GR32_NOREX
GR64_TC_and_GR64_with_sub_32bit_in_GR32_NOAX
GR64_with_sub_32bit_in_GR32_NOAX_and_GR32_NOREX_NOSP
GR64_TCW64_and_GR64_with_sub_32bit_in_GR32_NOAX
GR64_TC_and_GR64_with_sub_32bit_in_GR32_NOAX_and_GR32_NOREX
GR64_with_sub_32bit_in_GR32_TC
GR64_with_sub_32bit_in_GR32_ABCD_and_GR32_NOAX
GR64_with_sub_32bit_in_GR32_NOAX_and_GR32_TC
GR64_with_sub_32bit_in_GR32_AD
GR64_with_sub_32bit_in_GR32_AD_and_GR32_NOAX
The other targets in the tree are not weird enough to be affected.
llvm-svn: 146872
The function TRI::getCommonSubClass(A, B) returns the largest common
sub-class of the register classes A and B. This patch teaches TableGen
to synthesize sub-classes such that the answer is always maximal.
In other words, every register that is in both A and B will also be
present in getCommonSubClass(A, B).
This introduces these synthetic register classes:
ARM:
GPRnopc_and_hGPR
GPRnopc_and_hGPR
hGPR_and_rGPR
GPRnopc_and_hGPR
GPRnopc_and_hGPR
hGPR_and_rGPR
tGPR_and_tcGPR
hGPR_and_tcGPR
X86:
GR32_NOAX_and_GR32_NOSP
GR32_NOAX_and_GR32_NOREX
GR64_NOSP_and_GR64_TC
GR64_NOSP_and_GR64_TC
GR64_NOREX_and_GR64_TC
GR32_NOAX_and_GR32_NOSP
GR32_NOAX_and_GR32_NOREX
GR32_NOAX_and_GR32_NOREX_NOSP
GR64_NOSP_and_GR64_TC
GR64_NOREX_and_GR64_TC
GR64_NOREX_NOSP_and_GR64_TC
GR32_NOAX_and_GR32_NOSP
GR32_NOAX_and_GR32_NOREX
GR32_NOAX_and_GR32_NOREX_NOSP
GR32_ABCD_and_GR32_NOAX
GR32_NOAX_and_GR32_NOSP
GR32_NOAX_and_GR32_NOREX
GR32_NOAX_and_GR32_NOREX_NOSP
GR32_ABCD_and_GR32_NOAX
GR32_NOAX_and_GR32_TC
GR32_NOAX_and_GR32_NOSP
GR64_NOSP_and_GR64_TC
GR32_NOAX_and_GR32_NOREX
GR32_NOAX_and_GR32_NOREX_NOSP
GR64_NOREX_and_GR64_TC
GR64_NOREX_NOSP_and_GR64_TC
GR32_ABCD_and_GR32_NOAX
GR64_ABCD_and_GR64_TC
GR32_NOAX_and_GR32_TC
GR32_AD_and_GR32_NOAX
Other targets are unaffected.
llvm-svn: 146657
For example, ARM allows:
vmov.u32 s4, #0 -> vmov.i32, #0
'u32' is a more specific designator for the 32-bit integer type specifier
and is legal for any instruction which accepts 'i32' as a datatype suffix.
We want to say,
def : TokenAlias<".u32", ".i32">;
This works by marking the match class of 'From' as a subclass of the
match class of 'To'.
rdar://10435076
llvm-svn: 145992
1. Added opcode BUNDLE
2. Taught MachineInstr class to deal with bundled MIs
3. Changed MachineBasicBlock iterator to skip over bundled MIs; added an iterator to walk all the MIs
4. Taught MachineBasicBlock methods about bundled MIs
llvm-svn: 145975
