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| author | Chris Lattner <sabre@nondot.org> | 2011-04-18 06:55:51 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-04-18 06:55:51 +0000 |
| commit | 562d6e82bdd5d7f3554c60709306e897b59d4f09 (patch) | |
| tree | ae8ed663ee79396c74a184df0f5c7f7bf50a03b8 /llvm/lib | |
| parent | 80254a53cc428b59bada353ab552af466bc5c63b (diff) | |
| download | bcm5719-llvm-562d6e82bdd5d7f3554c60709306e897b59d4f09.tar.gz bcm5719-llvm-562d6e82bdd5d7f3554c60709306e897b59d4f09.zip | |
fix rdar://9297011 - udiv by power of two causing fast-isel rejects
llvm-svn: 129693
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/FastISel.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp index 0f60cbfb9bb..d3a721f8754 100644 --- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -990,6 +990,10 @@ unsigned FastISel::FastEmit_ri_(MVT VT, unsigned Opcode, if (Opcode == ISD::MUL && isPowerOf2_64(Imm)) { Opcode = ISD::SHL; Imm = Log2_64(Imm); + } else if (Opcode == ISD::UDIV && isPowerOf2_64(Imm)) { + // div x, 8 -> srl x, 3 + Opcode = ISD::SRL; + Imm = Log2_64(Imm); } // Horrible hack (to be removed), check to make sure shift amounts are |
