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| author | Hans Wennborg <hans@hanshq.net> | 2017-02-16 00:04:05 +0000 |
|---|---|---|
| committer | Hans Wennborg <hans@hanshq.net> | 2017-02-16 00:04:05 +0000 |
| commit | a468601e0eadd6b4cc5d56e5aa729320a296fa46 (patch) | |
| tree | 65eb408e24d23a40aa0865d36f7cd0b3fdcff5c5 /llvm/lib/Target/X86/X86InstrInfo.h | |
| parent | d77a6730b181d6eea672c30e3a736c1281a9a3f0 (diff) | |
| download | bcm5719-llvm-a468601e0eadd6b4cc5d56e5aa729320a296fa46.tar.gz bcm5719-llvm-a468601e0eadd6b4cc5d56e5aa729320a296fa46.zip | |
[X86] Re-enable conditional tail calls and fix PR31257.
This reverts r294348, which removed support for conditional tail calls
due to the PR above. It fixes the PR by marking live registers as
implicitly used and defined by the now predicated tailcall. This is
similar to how IfConversion predicates instructions.
Differential Revision: https://reviews.llvm.org/D29856
llvm-svn: 295262
Diffstat (limited to 'llvm/lib/Target/X86/X86InstrInfo.h')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h index 0d4bc5d0fb6..c2644a35e48 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.h +++ b/llvm/lib/Target/X86/X86InstrInfo.h @@ -316,6 +316,13 @@ public: // Branch analysis. bool isUnpredicatedTerminator(const MachineInstr &MI) const override; + bool isUnconditionalTailCall(const MachineInstr &MI) const override; + bool canMakeTailCallConditional(SmallVectorImpl<MachineOperand> &Cond, + const MachineInstr &TailCall) const override; + void replaceBranchWithTailCall(MachineBasicBlock &MBB, + SmallVectorImpl<MachineOperand> &Cond, + const MachineInstr &TailCall) const override; + bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB, SmallVectorImpl<MachineOperand> &Cond, |
