ARM: Add a pack pattern for matching arithmetic shift right
llvm-svn: 185714
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@ -4016,6 +4016,9 @@ def PKHTB : APKHI<0b01101000, 1, (outs GPRnopc:$Rd),
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def : ARMV6Pat<(or (and GPRnopc:$src1, 0xFFFF0000),
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(srl GPRnopc:$src2, imm16:$sh)),
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(PKHTB GPRnopc:$src1, GPRnopc:$src2, imm16:$sh)>;
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def : ARMV6Pat<(or (and GPRnopc:$src1, 0xFFFF0000),
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(sra GPRnopc:$src2, imm16_31:$sh)),
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(PKHTB GPRnopc:$src1, GPRnopc:$src2, imm16_31:$sh)>;
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def : ARMV6Pat<(or (and GPRnopc:$src1, 0xFFFF0000),
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(and (srl GPRnopc:$src2, imm1_15:$sh), 0xFFFF)),
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(PKHTB GPRnopc:$src1, GPRnopc:$src2, imm1_15:$sh)>;
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@ -99,3 +99,13 @@ entry:
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%tmp3 = or i32 %tmp, %tmp2
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ret i32 %tmp3
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}
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; CHECK: test10:
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; CHECK: pkhtb r0, r0, r1, asr #17
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define i32 @test10(i32 %src1, i32 %src2) {
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entry:
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%tmp = and i32 %src1, -65536
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%tmp2 = ashr i32 %src2, 17
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%tmp3 = or i32 %tmp, %tmp2
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ret i32 %tmp3
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}
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