Ulrich Weigand 86aef0a4f0 On PowerPC64, integer return values (as well as arguments) are supposed ... to be extended to a full register. This is modeled in the IR by marking the return value (or argument) with a signext or zeroext attribute. However, while these attributes are respected for function arguments, they are currently ignored for function return values by the PowerPC back-end. This patch updates PPCCallingConv.td to ask for the promotion to i64, and fixes LowerReturn and LowerCallResult to implement it. The new test case verifies that both arguments and return values are properly extended when passing them; and also that the optimizers understand incoming argument and return values are in fact guaranteed by the ABI to be extended. The patch caused a spurious breakage in CodeGen/PowerPC/coalesce-ext.ll, since the test case used a "ret" instruction to create a use of an i32 value at the end of the function (to set up data flow as required for what the test is intended to test). Since there's now an implicit promotion to i64, that data flow no longer works as expected. To fix this, this patch now adds an extra "add" to ensure we have an appropriate use of the i32 value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167396 91177308-0d34-0410-b5e6-96231b3b80d8		2012-11-05 19:39:45 +00:00
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Analysis	Don't infer whether a value is captured in the current function from the	2012-11-05 10:48:24 +00:00
Archive
AsmParser	Change ForceSizeOpt attribute into MinSize attribute	2012-10-30 16:32:52 +00:00
Bitcode	Move the Attributes::Builder outside of the Attributes class and into its own class named AttrBuilder. No functionality change.	2012-10-15 20:35:56 +00:00
CodeGen	Be careful not to optimize a SELECT_CC into a SETCC post-legalization if the SETCC node would be illegal.	2012-11-03 00:17:26 +00:00
DebugInfo	Reformat and 80-column this. It's not strictly conforming	2012-10-30 21:36:43 +00:00
ExecutionEngine	Change resolveRelocation parameters so the relocations can find placeholder values in the original object buffer.	2012-11-02 19:45:23 +00:00
Linker
MC	Add support for generating dwarf debugging info with assembly files	2012-11-01 17:31:35 +00:00
Object	Add interface for querying object files for symbol values.	2012-10-29 10:47:00 +00:00
Support	XLC supports the same atomic functions as GCC, use them.	2012-11-02 20:54:45 +00:00
TableGen	Remove exception handling usage from tblgen.	2012-10-25 20:33:17 +00:00
Target	On PowerPC64, integer return values (as well as arguments) are supposed	2012-11-05 19:39:45 +00:00
Transforms	Generalize the transform that boosts GEP indices to the size of a pointer to	2012-11-03 11:44:17 +00:00
VMCore	Include all the fields so we can correctly emit DW_TAG_structure_type for C++ structs.	2012-11-02 23:33:23 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile