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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-04-28 06:21:38 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-04-28 06:21:38 +0000 |
| commit | 9b10dae0bf3a796ac06e94f072ac67126e30a255 (patch) | |
| tree | 433533f7d7c96f82ab574647b4db000ae20e9c52 /lib/Target/ARM/ARMConstantIslandPass.cpp | |
| parent | 2674a4acdb51ce610d060b76608f631765a6e508 (diff) | |
| download | llvm-9b10dae0bf3a796ac06e94f072ac67126e30a255.tar.gz llvm-9b10dae0bf3a796ac06e94f072ac67126e30a255.tar.bz2 llvm-9b10dae0bf3a796ac06e94f072ac67126e30a255.tar.xz | |
Fix a problem with blocks that need to be split twice.
The code could search past the end of the basic block when there was
already a constant pool entry after the block.
Test case with giant basic block in SingleSource/UnitTests/Vector/constpool.c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155753 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMConstantIslandPass.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMConstantIslandPass.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp index 896955170a..3e4e732ddb 100644 --- a/lib/Target/ARM/ARMConstantIslandPass.cpp +++ b/lib/Target/ARM/ARMConstantIslandPass.cpp @@ -1301,9 +1301,10 @@ void ARMConstantIslands::createNewWater(unsigned CPUserIndex, // pool entries following this block; only the last one is in the water list. // Back past any possible branches (allow for a conditional and a maximally // long unconditional). - if (BaseInsertOffset >= BBInfo[UserMBB->getNumber()+1].Offset) - BaseInsertOffset = BBInfo[UserMBB->getNumber()+1].Offset - - (isThumb1 ? 6 : 8); + if (BaseInsertOffset + 8 >= UserBBI.postOffset()) { + BaseInsertOffset = UserBBI.postOffset() - UPad - 8; + DEBUG(dbgs() << format("Move inside block: %#x\n", BaseInsertOffset)); + } unsigned EndInsertOffset = BaseInsertOffset + 4 + UPad + CPEMI->getOperand(2).getImm(); MachineBasicBlock::iterator MI = UserMI; @@ -1315,6 +1316,7 @@ void ARMConstantIslands::createNewWater(unsigned CPUserIndex, Offset < BaseInsertOffset; Offset += TII->GetInstSizeInBytes(MI), MI = llvm::next(MI)) { + assert(MI != UserMBB->end() && "Fell off end of block"); if (CPUIndex < NumCPUsers && CPUsers[CPUIndex].MI == MI) { CPUser &U = CPUsers[CPUIndex]; if (!isOffsetInRange(Offset, EndInsertOffset, U)) { |