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12 Commits

Author SHA1 Message Date
Matt Arsenault 05e96f4444 R600: Try to convert BFE back to standard bit ops when possible. 
This allows existing DAG combines to work on them, and then
we can re-match to BFE if necessary during instruction selection.

llvm-svn: 209462
 2014-05-22 18:09:12 +00:00
Matt Arsenault 5565f65e13 R600: Add dag combine for BFE 
llvm-svn: 209461
 2014-05-22 18:09:07 +00:00
Matt Arsenault bf8694d36d R600: Implement ComputeNumSignBitsForTargetNode for BFE 
llvm-svn: 209460
 2014-05-22 18:09:03 +00:00
Jay Foad a0653a3e6c Rename ComputeMaskedBits to computeKnownBits. "Masked" has been 
inappropriate since it lost its Mask parameter in r154011.

llvm-svn: 208811
 2014-05-14 21:14:37 +00:00
Matt Arsenault 5dbd5db518 R600: Make sign_extend_inreg legal. 
Don't know why I didn't just do this in the first place.

llvm-svn: 206862
 2014-04-22 03:49:30 +00:00
Matt Arsenault 78b8670aac R600/SI: Try to use scalar BFE. 
Use scalar BFE with constant shift and offset when possible.
This is complicated by the fact that the scalar version packs
the two operands of the vector version into one.

llvm-svn: 206558
 2014-04-18 05:19:26 +00:00
Matt Arsenault 27cc958dff R600/SI: Match sign_extend_inreg to s_sext_i32_i8 and s_sext_i32_i16 
llvm-svn: 206547
 2014-04-18 01:53:18 +00:00
Matt Arsenault 4ef2588b65 R600: Extend r600 sign_extend_inreg tests for EG 
Patch by: Jan Vesely <jan.vesely@rutgers.edu>

llvm-svn: 206349
 2014-04-16 01:41:34 +00:00
Matt Arsenault b517c8128e R600: Implement isZExtFree. 
This allows 64-bit operations that are truncated to be reduced
to 32-bit ones.

llvm-svn: 204946
 2014-03-27 17:23:31 +00:00
Matt Arsenault d125d74a73 R600/SI: Fix unreachable with a sext_in_reg to an illegal type. 
llvm-svn: 204945
 2014-03-27 17:23:24 +00:00
Matt Arsenault 90b733a3cf R600: Add a testcase for sext_in_reg I missed. 
This sext_inreg i32 in i64 case was already handled, but not enabled.

llvm-svn: 204840
 2014-03-26 18:31:06 +00:00
Matt Arsenault fae02989b7 R600: Match sign_extend_inreg to BFE instructions 
llvm-svn: 204072
 2014-03-17 18:58:11 +00:00