Commit Graph

8 Commits

Author SHA1 Message Date
Simon Pilgrim e7c06423c1 [X86] Add scalar undef sdiv/srem/udiv/urem combine tests
llvm-svn: 321823
2018-01-04 21:33:19 +00:00
Simon Pilgrim 208fab193b [X86] Add common CHECK prefix for tests without SSE/AVX codegen
llvm-svn: 321810
2018-01-04 18:23:46 +00:00
Simon Pilgrim 5643b40d91 [X86] Show missed combine for X/X for SDIV/UDIV and X%X for SREM/UREM
llvm-svn: 321807
2018-01-04 18:20:46 +00:00
Francis Visoiu Mistrih 25528d6de7 [CodeGen] Unify MBB reference format in both MIR and debug output
As part of the unification of the debug format and the MIR format, print
MBB references as '%bb.5'.

The MIR printer prints the IR name of a MBB only for block definitions.

* find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)->getNumber\(\)/" << printMBBReference(*\1)/g'
* find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)\.getNumber\(\)/" << printMBBReference(\1)/g'
* find . \( -name "*.txt" -o -name "*.s" -o -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#([0-9]+)/%bb.\1/g'
* grep -nr 'BB#' and fix

Differential Revision: https://reviews.llvm.org/D40422

llvm-svn: 319665
2017-12-04 17:18:51 +00:00
Simon Pilgrim 05ab8ffc7e [DAGCombiner] Try to use SelectionDAG::isKnownToBeAPowerOfTwo instead of just APInt::isPowerOf2
Generalize sdiv/udiv/srem/urem combines using APInt::isPowerOf2, which only works for const/splat-const values, to call SelectionDAG::isKnownToBeAPowerOfTwo instead which recognises many more cases.

Added a DAGCombiner::BuildLogBase2 helper since PowerOf2 combines often involve taking the log2 of such a value.

Differential Revision: https://reviews.llvm.org/D27714

llvm-svn: 289654
2016-12-14 15:08:13 +00:00
Simon Pilgrim ebe58191c8 [X86][SSE] Add AVX1 tests to sdiv/udiv srem/urem combine tests
As requested on D27714

llvm-svn: 289652
2016-12-14 14:39:51 +00:00
Simon Pilgrim 4ebb04510a [DAGCombiner] Enable sdiv(x.y) -> udiv(x,y) combine for vectors
SelectionDAG::SignBitIsZero (via SelectionDAG::computeKnownBits) has supported vectors since rL280927

llvm-svn: 285118
2016-10-25 20:56:42 +00:00
Simon Pilgrim 61cdeb46c9 [X86][SSE] Added vector sdiv combine tests
llvm-svn: 285112
2016-10-25 20:25:47 +00:00