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| author | Tim Northover <tnorthover@apple.com> | 2018-09-07 09:21:25 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2018-09-07 09:21:25 +0000 |
| commit | bb7d7b3d33e856e8a640d394954a29a59b32a3e6 (patch) | |
| tree | c2c2afadc9e44ad85496c41f6fb47b6753f07cf9 /llvm/lib/Target/ARM/ARMFrameLowering.cpp | |
| parent | d49c32ce3f3f87ae7b04c168438a038a632db0c1 (diff) | |
| download | llvm-bb7d7b3d33e856e8a640d394954a29a59b32a3e6.zip llvm-bb7d7b3d33e856e8a640d394954a29a59b32a3e6.tar.gz llvm-bb7d7b3d33e856e8a640d394954a29a59b32a3e6.tar.bz2 | |
ARM: fix Thumb2 CodeGen for ldrex with folded frame-index.
Because t2LDREX (& t2STREX) were marked as AddrModeNone, but did allow a
FrameIndex operand, rewriteT2FrameIndex asserted. This gives them a
proper addressing-mode and tells the rewriter about it so that encodable
offsets are exploited and others are rejected.
Should fix PR38828.
llvm-svn: 341642
Diffstat (limited to 'llvm/lib/Target/ARM/ARMFrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMFrameLowering.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMFrameLowering.cpp b/llvm/lib/Target/ARM/ARMFrameLowering.cpp index 2f57019..742d5dd 100644 --- a/llvm/lib/Target/ARM/ARMFrameLowering.cpp +++ b/llvm/lib/Target/ARM/ARMFrameLowering.cpp @@ -1516,6 +1516,7 @@ static unsigned estimateRSStackSizeLimit(MachineFunction &MF, break; case ARMII::AddrMode5: case ARMII::AddrModeT2_i8s4: + case ARMII::AddrModeT2_ldrex: Limit = std::min(Limit, ((1U << 8) - 1) * 4); break; case ARMII::AddrModeT2_i12: |