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* Change -mno-mmx to be more compatible with gcc. Specifically, -mno-mmx ↵Eli Friedman2011-07-081-1/+1
| | | | | | | | | | | | should not imply -mno-sse. Note that because we don't usually touch the MMX registers anyway, all -mno-mmx needs to do is tweak the x86-32 calling convention a little for vectors that look like MMX vectors, and prevent the definition of __MMX__. clang doesn't actually stop the user from using MMX inline asm operands or MMX builtins in -mno-mmx mode; as a QOI issue, it would be nice to diagnose, but I doubt it really matters much. <rdar://problem/9694837> llvm-svn: 134770
* make the x86-32 backend specify a byval alignment, even when theChris Lattner2011-05-221-2/+2
| | | | | | | code generator will do it. With this patch, clang compiles the example in PR9794 to not have an alloca temporary. llvm-svn: 131881
* Reapply r116684 with fixes. The test cases needed to be updated.Bill Wendling2010-10-181-2/+2
| | | | llvm-svn: 116696
* IRgen/ABI/x86-32: Realign indirect arguments when the ABI requires us to passDaniel Dunbar2010-09-161-12/+12
| | | | | | them with a smaller alignment than the rest of codegen expects. llvm-svn: 114115
* IRgen/x86_32/Linux: Linux seems to align all stack objects to 4 bytes, unlikeDaniel Dunbar2010-09-161-0/+51
Darwin. Checked vs the handiest Linux llvm-gcc I had around, someone on Linux is welcome to investigate more. llvm-svn: 114112
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