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| author | Chris Lattner <sabre@nondot.org> | 2010-12-20 00:55:43 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-12-20 00:55:43 +0000 |
| commit | 37944985a569f8c2b0d75dafd9e2739a9887ac5d (patch) | |
| tree | 3bdd110097a8ef325d2fc11058d28061be809b7c /lib/Support/Program.cpp | |
| parent | e273690d7a52d2ab809e948ef93685885dde66bb (diff) | |
Fix a bug in the scheduler's handling of "unspillable" vregs.
Imagine we see:
EFLAGS = inst1
EFLAGS = inst2 FLAGS
gpr = inst3 EFLAGS
Previously, we would refuse to schedule inst2 because it clobbers
the EFLAGS of the predecessor. However, it also uses the EFLAGS
of the predecessor, so it is safe to emit. SDep edges ensure that
the right order happens already anyway.
This fixes 2 testsuite crashes with the X86 patch I'm going to
commit next.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122211 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/Program.cpp')
0 files changed, 0 insertions, 0 deletions