diff options
| author | Louis Gerbarg <lgg@apple.com> | 2014-06-16 17:35:40 +0000 |
|---|---|---|
| committer | Louis Gerbarg <lgg@apple.com> | 2014-06-16 17:35:40 +0000 |
| commit | a564159d85ead67f5bea1d6fda1b7e261db23825 (patch) | |
| tree | 679486391fecc078686a687bce2e67f14a473e30 /lib | |
| parent | dc2dc390f65ecc3b769c806cfc40b14fd42eed91 (diff) | |
| download | llvm-a564159d85ead67f5bea1d6fda1b7e261db23825.tar.gz llvm-a564159d85ead67f5bea1d6fda1b7e261db23825.tar.bz2 llvm-a564159d85ead67f5bea1d6fda1b7e261db23825.tar.xz | |
Fix illegal relocations in X86FastISel
On x86_86 the lea instruction can only use a 32 bit immediate value. When
the code is compiled statically the RIP register is not used, meaning the
immediate is all that can be used for the relocation, which is not sufficient
in the case of targets more than +/- 2GB away. This patch bails out of fast
isel in those cases and reverts to DAG which does the right thing.
Test case included.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211040 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86FastISel.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp index 0308b1e029..4b8a8362c5 100644 --- a/lib/Target/X86/X86FastISel.cpp +++ b/lib/Target/X86/X86FastISel.cpp @@ -2709,6 +2709,10 @@ unsigned X86FastISel::TargetMaterializeConstant(const Constant *C) { // Materialize addresses with LEA instructions. if (isa<GlobalValue>(C)) { + //LEA can only handle 32 bit immediates + if (TM.getRelocationModel() == Reloc::Static && Subtarget->is64Bit()) + return false; + X86AddressMode AM; if (X86SelectAddress(C, AM)) { // If the expression is just a basereg, then we're done, otherwise we need |