diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-15 22:24:22 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-15 22:24:22 +0000 |
| commit | eb06b0b6aa627c6698471d4df71570f080fb3c5c (patch) | |
| tree | c2ddcc4e6eea7c21ee6537680354906ca3be5001 /lib/CodeGen | |
| parent | 12a88f81de00f9cb2e98d7898efff51e079e79b9 (diff) | |
Accept null PhysReg arguments to checkRegMaskInterference.
Calling checkRegMaskInterference(VirtReg) checks if VirtReg crosses any
regmask operands, regardless of the registers they clobber.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158563 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/LiveRegMatrix.cpp | 2 | ||||
| -rw-r--r-- | lib/CodeGen/LiveRegMatrix.h | 3 |
2 files changed, 3 insertions, 2 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, diff --git a/lib/CodeGen/LiveRegMatrix.h b/lib/CodeGen/LiveRegMatrix.h index 4c3e7d4782..019a5f5877 100644 --- a/lib/CodeGen/LiveRegMatrix.h +++ b/lib/CodeGen/LiveRegMatrix.h @@ -124,7 +124,8 @@ public: /// Check for regmask interference only. /// Return true if VirtReg crosses a regmask operand that clobbers PhysReg. - bool checkRegMaskInterference(LiveInterval &VirtReg, unsigned PhysReg); + /// If PhysReg is null, check if VirtReg crosses any regmask operands. + bool checkRegMaskInterference(LiveInterval &VirtReg, unsigned PhysReg = 0); /// Check for regunit interference only. /// Return true if VirtReg overlaps a fixed assignment of one of PhysRegs's |