Commit Graph

4 Commits

Author SHA1 Message Date
Craig Topper 4937adf75f [X86] Emit SBB instead of SETCC_CARRY from LowerSELECT. Break false dependency on the SBB input.
I'm hoping we can just replace SETCC_CARRY with SBB. This is another step towards that.

I've explicitly used zero as the input to the setcc to avoid a false dependency that we've had with the SETCC_CARRY. I changed one of the patterns that used NEG to instead use an explicit compare with 0 on the LHS. We needed the zero anyway to avoid the false dependency. The negate would clobber its input register. By using a CMP we can avoid that which could be useful.

Differential Revision: https://reviews.llvm.org/D55414

llvm-svn: 348959
2018-12-12 19:20:21 +00:00
Sanjay Patel 40509997eb [x86] make tests immune to improvements in undef handling
llvm-svn: 347161
2018-11-18 15:27:19 +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
Elena Demikhovsky dcc86d5bb6 Shift-left (ISD::SHL) operation crashes on "DAG Legalization" phase.
https://llvm.org/bugs/show_bug.cgi?id=29058.

While node legalization we tried to legalize its operands.
If an operand node is replaced during legalization the user node may be destroyed.

Differential Revision: https://reviews.llvm.org/D24244

llvm-svn: 280862
2016-09-07 20:54:33 +00:00