Commit Graph

2 Commits

Author SHA1 Message Date
Matt Arsenault 567631bdd4 BranchRelaxation: Fix handling of blocks with multiple conditional
branches

Looping over all terminators exposed AArch64 tests hitting
an assert from analyzeBranch failing. I believe these cases
were miscompiled before.

e.g.
  fcmp s0, s1
  b.ne LBB0_1
  b.vc LBB0_2
  b LBB0_2
LBB0_1:
  ; Large block
LBB0_2:
 ; ...

Both of the individual conditional branches need to
be expanded, since neither can reach the final block.

Split the original block into ones which analyzeBranch
will be able to understand.

llvm-svn: 279499
2016-08-23 01:30:30 +00:00
Matt Arsenault dfa7683d71 AArch64: Add missing branch relaxation tests
The branch relaxation pass has the worst test coverage
of any pass in AArch64. Add a few tests that hit some
large pieces of code in the pass.

llvm-svn: 277428
2016-08-02 07:41:05 +00:00