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| author | Swaroop Sridhar <Swaroop.Sridhar@microsoft.com> | 2015-06-04 23:03:21 +0000 |
|---|---|---|
| committer | Swaroop Sridhar <Swaroop.Sridhar@microsoft.com> | 2015-06-04 23:03:21 +0000 |
| commit | 70d18df18fab3d9d73b724b1042abaa536289bbe (patch) | |
| tree | 79421a3ad1bc8128379b8fd42fd2110079e127e1 /llvm/lib/Object/ELFObjectFile.cpp | |
| parent | 18ad2e54ab8012e3dd8bffc6f0e1a98683afa2fc (diff) | |
| download | llvm-70d18df18fab3d9d73b724b1042abaa536289bbe.zip llvm-70d18df18fab3d9d73b724b1042abaa536289bbe.tar.gz llvm-70d18df18fab3d9d73b724b1042abaa536289bbe.tar.bz2 | |
Statepoint: Fix handling of Far Immediate calls
gc.statepoint intrinsics with a far immediate call target
were lowered incorrectly as pc-rel32 calls.
This change fixes the problem, and generates an indirect call
via a scratch register.
For example:
Intrinsic:
%safepoint_token = call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* inttoptr (i64 140727162896504 to void ()*), i32 0, i32 0, i32 0, i32 0)
Old Incorrect Lowering:
callq 140727162896504
New Correct Lowering:
movabsq $140727162896504, %rax
callq *%rax
In lowerCallFromStatepoint(), the callee-target was modified and
represented as a "TargetConstant" node, rather than a "Constant" node.
Undoing this modification enabled LowerCall() to generate the
correct CALL instruction.
llvm-svn: 239114
Diffstat (limited to 'llvm/lib/Object/ELFObjectFile.cpp')
0 files changed, 0 insertions, 0 deletions