This means that well connected blocks are copy coalesced before the less connected blocks. Connected blocks are more difficult to
coalesce because intervals are more complicated, so handling them first gives a greater chance of success.
llvm-svn: 90194
PEDANTIC defaults to ON and WERROR default to off.
Also add MSVC warnings. To disable warnings add the flags
LLVM_ENABLE_WARNINGS (default on).
Patch by Tobias Grosser!
llvm-svn: 90188
For VMOVv*i[16,32], op bit is don't care, and some cmode bits vary depending on
the immediate values.
Ref: Table A7-15 Modified immediate values for Advanced SIMD instructions.
llvm-svn: 90173
This helps us avoid silly copies when rematting values that are copied to a physical register:
leaq _.str44(%rip), %rcx
movq %rcx, %rsi
call _strcmp
becomes:
leaq _.str44(%rip), %rsi
call _strcmp
The coalescer will not touch the movq because that would tie down the physical register.
llvm-svn: 90163
branches even when optimizing for code size. Unless we find evidence to the
contrary in the future, the special treatment for indirect branches does not
have a significant effect on code size, and performance still matters with -Os.
llvm-svn: 90147
for all the processors where I have tried it, and even when it might not help
performance, the cost is quite low. The opportunities for duplicating
indirect branches are limited by other factors so code size does not change
much due to tail duplicating indirect branches aggressively.
llvm-svn: 90144
If no destination label is available, just point to the node itself
instead of pointing to some source label. Source and destination labels are
not related in any way.
llvm-svn: 90132
Graphviz can layout the graphs better if a node does not contain source
ports. Therefore only print the ports if the source ports are useful,
that means are not labeled with the empty string "".
This patch also simplifies graphs without any edgeSourceLabels e.g. the
dominance trees.
llvm-svn: 90131
more. Update the syntax we're checking for and filecheckize it too.
This will fix the selfhost buildbots but will 'break' the others (sigh) because
they're still linked against older LLVM which is emitting less optimized IR.
llvm-svn: 90104
