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comparison gen/abi-x86-64.cpp @ 1348:f3b92d26ad0f

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Revert [1346] for now, it breaks because of padding :(
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 12 May 2009 16:53:43 +0200
parents 6f4154b318ef
children 15e9762bb620
comparison
equal deleted inserted replaced
1347:3647bef175d7 1348:f3b92d26ad0f
41 #include "gen/logger.h" 41 #include "gen/logger.h"
42 #include "gen/dvalue.h" 42 #include "gen/dvalue.h"
43 #include "gen/llvmhelpers.h" 43 #include "gen/llvmhelpers.h"
44 #include "gen/abi.h" 44 #include "gen/abi.h"
45 #include "gen/abi-x86-64.h" 45 #include "gen/abi-x86-64.h"
46 //#include "gen/llvm-version.h" // only use is commented out.
46 #include "ir/irfunction.h" 47 #include "ir/irfunction.h"
47 48
48 #include <cassert> 49 #include <cassert>
49 #include <map> 50 #include <map>
50 #include <string> 51 #include <string>
398 // Returns true if the struct fits in return registers in the x86-64 fastcc 399 // Returns true if the struct fits in return registers in the x86-64 fastcc
399 // calling convention. 400 // calling convention.
400 bool retStructInRegs(TypeStruct* st) { 401 bool retStructInRegs(TypeStruct* st) {
401 // 'fastcc' allows returns in up to two registers of each kind: 402 // 'fastcc' allows returns in up to two registers of each kind:
402 DRegCount state(2, 2, 2); 403 DRegCount state(2, 2, 2);
404 #if 1 //LLVM_REV < 67588
405 // (If uncommenting the LLVM_REV line above, also uncomment llvm-version #include
406
407 // LLVM before trunk r67588 doesn't allow a second int to be an i1 or
408 // i8. (See <http://llvm.org/PR3861>)
409 // Rather than complicating shouldPassStructInRegs(), just disallow
410 // second integers for now.
411 // FIXME: Disabling this for older LLVM only makes the abi dependent on
412 // LLVM revision, which seems like a bad idea. We could extend
413 // i8 parts to i16 to work around this issue until 2.6...
414 // TODO: Remove this workaround when support for LLVM 2.5 is dropped.
415 state.ints = 1;
416 #endif
403 return shouldPassStructInRegs(st, state); 417 return shouldPassStructInRegs(st, state);
404 } 418 }
405 419
406 // Heuristic for determining whether to pass a struct type directly or 420 // Heuristic for determining whether to pass a struct type directly or
407 // bump it to memory. 421 // bump it to memory.