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Remove alignment from deserted constant islands.

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ARMConstantIslandPass may sometimes leave empty constant islands behind
(it really shouldn't). Remove the alignment from the empty islands so
the size calculations are still correct.

This should fix the many Thumb1 assembler errors in the nightly test
suite.

The reduced test case for this problem is way too big. That is to be
expected for ARMConstantIslandPass bugs.

<rdar://problem/10534709>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145970 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-12-06 21:55:35 +00:00
parent 581ac2723c
commit 305e5fe797
1 changed files with 3 additions and 0 deletions
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3
lib/Target/ARM/ARMConstantIslandPass.cpp
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@ -1355,6 +1355,9 @@ void ARMConstantIslands::RemoveDeadCPEMI(MachineInstr *CPEMI) {
Size += BBSizes[CPEBB->getNumber()];
BBSizes[CPEBB->getNumber()] = 0;
}
// This block no longer needs to be aligned. <rdar://problem/10534709>.
CPEBB->setAlignment(0);
}
AdjustBBOffsetsAfter(CPEBB, -Size);
// An island has only one predecessor BB and one successor BB. Check if