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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156513 91177308-0d34-0410-b5e6-96231b3b80d8
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can't overflow due to promotion rules; emit a wrapping add for those cases.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126816 91177308-0d34-0410-b5e6-96231b3b80d8
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arithmetic. This is part of PR9256, it would be great if someone else
wired up -fno-strict-overflow in the driver to -fwrapv.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126718 91177308-0d34-0410-b5e6-96231b3b80d8
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simply aborting when a signed operation overflows. This mirrors the (GCC-incompatible) behaviour from clang 1.0 and 1.1 when -ftrapv was specified, but allows the handler to be defined for each compilation unit.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114192 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106962 91177308-0d34-0410-b5e6-96231b3b80d8
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code so we can use it from VisitUnaryMinus.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106957 91177308-0d34-0410-b5e6-96231b3b80d8
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As part of this, pull together trapv handling into the same enum.
This also add support for NSW multiplies.
This also makes PCH disagreement on overflow behavior silent, since it
really doesn't matter except for warnings and codegen (no macros get
defined etc).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106956 91177308-0d34-0410-b5e6-96231b3b80d8
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