PGO branch weight: update edge weights in SelectionDAGBuilder.
When converting from "or + br" to two branches, or converting from
"and + br" to two branches, we correctly update the edge weights of
the two branches.
The previous attempt at r200431 was reverted at r200434 because of
two testing case failures. I modified my patch a little, but forgot
to re-run "make check-all".
Testing case CodeGen/ARM/lsr-unfolded-offset.ll is updated because of
the patch's impact on branch probability which causes changes in
spill placement.
llvm-svn: 200502
diff --git a/llvm/test/CodeGen/ARM/lsr-unfolded-offset.ll b/llvm/test/CodeGen/ARM/lsr-unfolded-offset.ll
index 26d4be2..1dafa00 100644
--- a/llvm/test/CodeGen/ARM/lsr-unfolded-offset.ll
+++ b/llvm/test/CodeGen/ARM/lsr-unfolded-offset.ll
@@ -4,7 +4,7 @@
; register pressure and therefore spilling. There is more room for improvement
; here.
-; CHECK: sub sp, #{{40|32|28|24}}
+; CHECK: sub sp, #{{40|36|32|28|24}}
; CHECK: %for.inc
; CHECK-NOT: ldr