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author | Saleem Abdulrasool <compnerd@compnerd.org> | 2014-06-12 20:06:33 +0000 |
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committer | Saleem Abdulrasool <compnerd@compnerd.org> | 2014-06-12 20:06:33 +0000 |
commit | 3455c40f918b7e869ed83420a7e84d01e2fccb9f (patch) | |
tree | b64ea71f4553e1488892cf0ddf82b3d5181693bb /lib | |
parent | a15b05e1aa18920a8f664a2af4c77874bc82474e (diff) | |
download | llvm-3455c40f918b7e869ed83420a7e84d01e2fccb9f.tar.gz llvm-3455c40f918b7e869ed83420a7e84d01e2fccb9f.tar.bz2 llvm-3455c40f918b7e869ed83420a7e84d01e2fccb9f.tar.xz |
CodeGen: enable mov.w/mov.t pairs with minsize for WoA
Windows on ARM uses COFF/PE which is intrinsically position independent. For
the case of 32-bit immediates, use a pair-wise relocation as otherwise we may
exceed the range of operators. This fixes a code generation crash when using
-Oz when targeting Windows on ARM.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210814 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Target/ARM/ARMSubtarget.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h index 2694c34293..6abae8b3cd 100644 --- a/lib/Target/ARM/ARMSubtarget.h +++ b/lib/Target/ARM/ARMSubtarget.h @@ -379,7 +379,12 @@ public: bool isR9Reserved() const { return IsR9Reserved; } - bool useMovt() const { return UseMovt && !isMinSize(); } + bool useMovt() const { + // NOTE Windows on ARM needs to use mov.w/mov.t pairs to materialise 32-bit + // immediates as it is inherently position independent, and may be out of + // range otherwise. + return UseMovt && (isTargetWindows() || !isMinSize()); + } bool supportsTailCall() const { return SupportsTailCall; } bool allowsUnalignedMem() const { return AllowsUnalignedMem; } |