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After Jakob's r147938 exception handling on i386 was completely broken.

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Restore the (obviously wrong) behavior from before r147938 without relying on
undefined behavior. Add a fat FIXME note.

This should fix nightly tester failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148030 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2012-01-12 17:37:18 +00:00
parent d2070b00ef
commit e2eb92578a
1 changed files with 7 additions and 0 deletions
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7
lib/Target/X86/X86FrameLowering.cpp
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@ -455,6 +455,13 @@ encodeCompactUnwindRegistersWithFrame(unsigned SavedRegs[CU_NUM_SAVED_REGS],
};
const unsigned *CURegs = (Is64Bit ? CU64BitRegs : CU32BitRegs);
// FIXME: The code below is WRONG and breaks tests on i386, see
// SingleSource/Regression/C++/EH/ctor_dtor_count.exec
// SingleSource/Regression/C++/EH/exception_spec_test.exec
// SingleSource/Regression/C++/EH/function_try_block.exec
// SingleSource/Regression/C++/EH/throw_rethrow_test.exec
return ~0U;
// Encode the registers in the order they were saved, 3-bits per register. The
// registers are numbered from 1 to 6.
uint32_t RegEnc = 0;