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| author | Pablo Barrio <pablo.barrio@arm.com> | 2017-12-04 16:55:49 +0000 |
|---|---|---|
| committer | Pablo Barrio <pablo.barrio@arm.com> | 2017-12-04 16:55:49 +0000 |
| commit | 2b4385846c86078e0012e7bfb2e8dc6476ae8dd0 (patch) | |
| tree | 92da7bef7c42566026d201d446d44bf0adfd02b7 /llvm/lib/CodeGen/StackColoring.cpp | |
| parent | f2fdc183b7bb771acd44bc9433557f36479fff79 (diff) | |
| download | bcm5719-llvm-2b4385846c86078e0012e7bfb2e8dc6476ae8dd0.tar.gz bcm5719-llvm-2b4385846c86078e0012e7bfb2e8dc6476ae8dd0.zip | |
Fix function pointer tail calls in armv8-M.base
Summary:
The compiler fails with the following error message:
fatal error: error in backend: ran out of registers during
register allocation
Tail call optimization for Armv8-M.base fails to meet all the required
constraints when handling calls to function pointers where the
arguments take up r0-r3. This is because the pointer to the
function to be called can only be stored in r0-r3, but these are
all occupied by arguments. This patch makes sure that tail call
optimization does not try to handle this type of calls.
Reviewers: chill, MatzeB, olista01, rengolin, efriedma
Reviewed By: olista01, efriedma
Subscribers: efriedma, aemerson, javed.absar, llvm-commits, kristof.beyls
Differential Revision: https://reviews.llvm.org/D40706
llvm-svn: 319664
Diffstat (limited to 'llvm/lib/CodeGen/StackColoring.cpp')
0 files changed, 0 insertions, 0 deletions
