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| author | Louis Gerbarg <lgg@apple.com> | 2014-05-12 19:53:52 +0000 |
|---|---|---|
| committer | Louis Gerbarg <lgg@apple.com> | 2014-05-12 19:53:52 +0000 |
| commit | 9cec62a27fe56f1775e23fdae57300edfdfe2699 (patch) | |
| tree | 96197c21a13935093389b8b2678ec1cc80e27302 /lib/Target/ARM/ARMInstrInfo.td | |
| parent | b36e348af3d593eebc07dc9b6be8ecc57ae88a09 (diff) | |
| download | llvm-9cec62a27fe56f1775e23fdae57300edfdfe2699.tar.gz llvm-9cec62a27fe56f1775e23fdae57300edfdfe2699.tar.bz2 llvm-9cec62a27fe56f1775e23fdae57300edfdfe2699.tar.xz | |
Add support bswap16 to/from memory compiling to rev16 on ARM/Thumb
The current patterns for REV16 misses mostn __builtin_bswap16() due to
legalization promoting the operands to from load/stores toi32s and then
truncing/extending them. This patch adds new patterns that catch the resultant
DAGs and codegens them to rev16 instructions. Tests included.
rdar://15353652
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208620 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMInstrInfo.td')
| -rw-r--r-- | lib/Target/ARM/ARMInstrInfo.td | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td index 82f203e101..1d2a7e1be4 100644 --- a/lib/Target/ARM/ARMInstrInfo.td +++ b/lib/Target/ARM/ARMInstrInfo.td @@ -4122,6 +4122,11 @@ def REV16 : AMiscA1I<0b01101011, 0b1011, (outs GPR:$Rd), (ins GPR:$Rm), Requires<[IsARM, HasV6]>, Sched<[WriteALU]>; +def : ARMV6Pat<(srl (bswap (extloadi16 addrmode3:$addr)), (i32 16)), + (REV16 (LDRH addrmode3:$addr))>; +def : ARMV6Pat<(truncstorei16 (srl (bswap GPR:$Rn), (i32 16)), addrmode3:$addr), + (STRH (REV16 GPR:$Rn), addrmode3:$addr)>; + let AddedComplexity = 5 in def REVSH : AMiscA1I<0b01101111, 0b1011, (outs GPR:$Rd), (ins GPR:$Rm), IIC_iUNAr, "revsh", "\t$Rd, $Rm", |