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| author | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | 2017-02-24 18:16:06 +0000 |
|---|---|---|
| committer | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | 2017-02-24 18:16:06 +0000 |
| commit | 195c5452d391903f57827532b964d25a7c82ebdf (patch) | |
| tree | 28aa4143b8d1c101c84f7cff91e84b41846dd3db /llvm/lib/Target/PowerPC | |
| parent | 82d53ed492bebd2a585fa4c37efc81ad1d6f68d9 (diff) | |
| download | bcm5719-llvm-195c5452d391903f57827532b964d25a7c82ebdf.tar.gz bcm5719-llvm-195c5452d391903f57827532b964d25a7c82ebdf.zip | |
[PowerPC] Use subfic instruction for subtract from immediate
Provide a 64-bit pattern to use SUBFIC for subtracting from a 16-bit immediate.
The corresponding pattern already exists for 32-bit integers.
Committing on behalf of Hiroshi Inoue.
Differential Revision: https://reviews.llvm.org/D29387
llvm-svn: 296144
Diffstat (limited to 'llvm/lib/Target/PowerPC')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstr64Bit.td | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCInstr64Bit.td b/llvm/lib/Target/PowerPC/PPCInstr64Bit.td index 0f12aa1aaa8..997b96ca6ec 100644 --- a/llvm/lib/Target/PowerPC/PPCInstr64Bit.td +++ b/llvm/lib/Target/PowerPC/PPCInstr64Bit.td @@ -1232,6 +1232,10 @@ def : Pat<(srl i64:$rS, i32:$rB), def : Pat<(shl i64:$rS, i32:$rB), (SLD $rS, $rB)>; +// SUBFIC +def : Pat<(sub imm64SExt16:$imm, i64:$in), + (SUBFIC8 $in, imm:$imm)>; + // SHL/SRL def : Pat<(shl i64:$in, (i32 imm:$imm)), (RLDICR $in, imm:$imm, (SHL64 imm:$imm))>; |
