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Add PPC64 mulli pattern

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The PPC backend had been missing a pattern to generate mulli for 64-bit
multiples. We had been generating it only for 32-bit multiplies. Unfortunately,
generating li + mulld unnecessarily increases register pressure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187807 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2013-08-06 17:03:03 +00:00
parent 62d6fa5e8f
commit 0e910d2cb5
2 changed files with 19 additions and 0 deletions
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3
lib/Target/PowerPC/PPCInstr64Bit.td
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@@ -542,6 +542,9 @@ defm DIVDU : XOForm_1r<31, 457, 0, (outs g8rc:$rT), (ins g8rc:$rA, g8rc:$rB),
defm MULLD : XOForm_1r<31, 233, 0, (outs g8rc:$rT), (ins g8rc:$rA, g8rc:$rB),
"mulld", "$rT, $rA, $rB", IntMulHD,
[(set i64:$rT, (mul i64:$rA, i64:$rB))]>, isPPC64;
def MULLI8 : DForm_2<7, (outs g8rc:$rD), (ins g8rc:$rA, s16imm64:$imm),
"mulli $rD, $rA, $imm", IntMulLI,
[(set i64:$rD, (mul i64:$rA, imm64SExt16:$imm))]>;
}
let neverHasSideEffects = 1 in {