diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86FastISel.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp index 4b8a8362c5..e490c274b5 100644 --- a/lib/Target/X86/X86FastISel.cpp +++ b/lib/Target/X86/X86FastISel.cpp @@ -2709,7 +2709,10 @@ unsigned X86FastISel::TargetMaterializeConstant(const Constant *C) { // Materialize addresses with LEA instructions. if (isa<GlobalValue>(C)) { - //LEA can only handle 32 bit immediates + // LEA can only handle 32 bit immediates. Currently this happens pretty + // rarely, so rather than deal with it just bail out of fast isel. If any + // architectures endis up needing to use this path a lot then fast isel + // could get the address with a MOV64ri and use that to load the value. if (TM.getRelocationModel() == Reloc::Static && Subtarget->is64Bit()) return false; |