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| author | Diogo N. Sampaio <diogo.sampaio@arm.com> | 2019-06-03 08:58:05 +0000 |
|---|---|---|
| committer | Diogo N. Sampaio <diogo.sampaio@arm.com> | 2019-06-03 08:58:05 +0000 |
| commit | df92f841105e23be1f2c3fe6bcc543d53cbf7576 (patch) | |
| tree | d6fa4dbe02bea05bf6f1e6c2c8372c053a8e54b4 /llvm/lib/Target/BPF/MCTargetDesc/BPFMCTargetDesc.cpp | |
| parent | a0bd6f8a1ae73887fc32b85cd44e85435310f9d3 (diff) | |
| download | bcm5719-llvm-df92f841105e23be1f2c3fe6bcc543d53cbf7576.tar.gz bcm5719-llvm-df92f841105e23be1f2c3fe6bcc543d53cbf7576.zip | |
[ARM][FIX] Ran out of registers due tail recursion
Summary:
- pr42062
When compiling for MinSize,
ARMTargetLowering::LowerCall decides to indirect
multiple calls to a same function. However,
it disconsiders the limitation that thumb1
indirect calls require the callee to be in a
register from r0 to r3 (llvm limiation).
If all those registers are used by arguments, the
compiler dies with "error: run out of registers
during register allocation".
This patch tells the function
IsEligibleForTailCallOptimization if we intend to
perform indirect calls, as to avoid tail call
optimization.
Reviewers: dmgreen, efriedma
Reviewed By: efriedma
Subscribers: javed.absar, kristof.beyls, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D62683
llvm-svn: 362366
Diffstat (limited to 'llvm/lib/Target/BPF/MCTargetDesc/BPFMCTargetDesc.cpp')
0 files changed, 0 insertions, 0 deletions
