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7839b00d43
This is a new version of http://reviews.llvm.org/D10260. It turned out that when you specify an integer register in inline asm on x86 you get the register of the required type size back. That means that X86TargetLowering::getRegForInlineAsmConstraint() has to accept any of the integer registers and adapt its size to the given target size which may be any 8/16/32/64 bit sized type. Surprisingly that means given a constraint of "{ax}" and a type of MVT::F32 we need to return X86::EAX. This change makes this face explicit, the previous code seemed like working by accident because there it never returned an error once a register was found. On the other hand this rewrite allows to actually return errors for invalid situations like requesting an integer register for an i128 type. Related to rdar://21042280 Differential Revision: http://reviews.llvm.org/D10813 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241002 91177308-0d34-0410-b5e6-96231b3b80d8 |
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