diff options
Diffstat (limited to 'lib/CodeGen/LiveRegMatrix.cpp')
| -rw-r--r-- | lib/CodeGen/LiveRegMatrix.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveRegMatrix.cpp b/lib/CodeGen/LiveRegMatrix.cpp index 61e1432b0e..cdb1776812 100644 --- a/lib/CodeGen/LiveRegMatrix.cpp +++ b/lib/CodeGen/LiveRegMatrix.cpp @@ -110,7 +110,7 @@ bool LiveRegMatrix::checkRegMaskInterference(LiveInterval &VirtReg, // The BitVector is indexed by PhysReg, not register unit. // Regmask interference is more fine grained than regunits. // For example, a Win64 call can clobber %ymm8 yet preserve %xmm8. - return !RegMaskUsable.empty() && !RegMaskUsable.test(PhysReg); + return !RegMaskUsable.empty() && (!PhysReg || !RegMaskUsable.test(PhysReg)); } bool LiveRegMatrix::checkRegUnitInterference(LiveInterval &VirtReg, |