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| author | Richard Osborne <richard@xmos.com> | 2014-02-27 17:47:54 +0000 |
|---|---|---|
| committer | Richard Osborne <richard@xmos.com> | 2014-02-27 17:47:54 +0000 |
| commit | cc331c8f40107934b4bfa36d3646126bc0c4a412 (patch) | |
| tree | f867df815194a68cc433659c8c4b73325e663193 /lib/Target/XCore/XCoreCallingConv.td | |
| parent | 870d997d8cd300b266e3157cddda357a80d702d5 (diff) | |
| download | llvm-cc331c8f40107934b4bfa36d3646126bc0c4a412.tar.gz llvm-cc331c8f40107934b4bfa36d3646126bc0c4a412.tar.bz2 llvm-cc331c8f40107934b4bfa36d3646126bc0c4a412.tar.xz | |
[XCore] Support functions returning more than 4 words.
If a function returns a large struct by value return the first 4 words
in registers and the rest on the stack in a location reserved by the
caller. This is needed to support the xC language which supports
functions returning an arbitrary number of return values. This is
r202397 reapplied with a fix to avoid an uninitialized read of a member.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202414 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/XCore/XCoreCallingConv.td')
| -rw-r--r-- | lib/Target/XCore/XCoreCallingConv.td | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Target/XCore/XCoreCallingConv.td b/lib/Target/XCore/XCoreCallingConv.td index b20d71f49c..e149e6d9ec 100644 --- a/lib/Target/XCore/XCoreCallingConv.td +++ b/lib/Target/XCore/XCoreCallingConv.td @@ -14,7 +14,11 @@ //===----------------------------------------------------------------------===// def RetCC_XCore : CallingConv<[ // i32 are returned in registers R0, R1, R2, R3 - CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>> + CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>>, + + // Integer values get stored in stack slots that are 4 bytes in + // size and 4-byte aligned. + CCIfType<[i32], CCAssignToStack<4, 4>> ]>; //===----------------------------------------------------------------------===// |