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14838 Commits

Author SHA1 Message Date
Chris Lattner 17ce82f71d New testcase 
llvm-svn: 17061
 2004-10-16 18:28:01 +00:00
Chris Lattner 5a02a3e963 Add support for undef and unreachable 
llvm-svn: 17059
 2004-10-16 18:24:35 +00:00
Chris Lattner aef20fbbb9 testcases for undefined and unreachable 
llvm-svn: 17058
 2004-10-16 18:24:11 +00:00
Chris Lattner fcfe78eaf8 Fix fix fix 
llvm-svn: 17057
 2004-10-16 18:21:50 +00:00
Chris Lattner 98e541457b Add support for unreachable 
llvm-svn: 17056
 2004-10-16 18:21:33 +00:00
Chris Lattner 61753bf847 Add support for undef 
llvm-svn: 17055
 2004-10-16 18:19:26 +00:00
Chris Lattner 770709befe Add support for undef, unreachable, and function flags 
llvm-svn: 17054
 2004-10-16 18:18:16 +00:00
Chris Lattner 4ff314968e Parse undef and unreachable 
llvm-svn: 17053
 2004-10-16 18:17:13 +00:00
Chris Lattner 2978437b76 Add support 
llvm-svn: 17052
 2004-10-16 18:16:19 +00:00
Chris Lattner ea9a85abe4 Add support for undef and unreachable 
llvm-svn: 17051
 2004-10-16 18:14:10 +00:00
Chris Lattner a3f3c8a1ad ADd support for undef and unreachable 
llvm-svn: 17050
 2004-10-16 18:13:47 +00:00
Chris Lattner e4bea062c7 Teach the X86 backend about unreachable and undef. Among other things, we 
now compile:

'foo() {}' into "ret" instead of "mov EAX, 0; ret"

llvm-svn: 17049
 2004-10-16 18:13:05 +00:00
Chris Lattner 583dfdcf86 Add support for unreachable and undef 
llvm-svn: 17048
 2004-10-16 18:12:13 +00:00
Chris Lattner 81a7a23494 Optimize instructions involving undef values. For example X+undef == undef. 
llvm-svn: 17047
 2004-10-16 18:11:37 +00:00
Chris Lattner 7e6d4a12b5 Add support for UndefValue 
llvm-svn: 17046
 2004-10-16 18:10:31 +00:00
Chris Lattner c0e2e82477 When promoting mem2reg, make uninitialized values become undef isntead of 0. 
llvm-svn: 17045
 2004-10-16 18:10:06 +00:00
Chris Lattner 646354bae1 Handle undef values as undefined on the constant lattice 
ignore unreachable instructions

llvm-svn: 17044
 2004-10-16 18:09:41 +00:00
Chris Lattner 6ac3ef950d Add note 
llvm-svn: 17043
 2004-10-16 18:09:25 +00:00
Chris Lattner 8e71c6a33d Add support for the undef value. Implement a new optimization based on globals 
that are initialized with undef.  When promoting malloc to a global, start out
initialized to undef

llvm-svn: 17042
 2004-10-16 18:09:00 +00:00
Chris Lattner 5e0b9f2eec Add support for undef and unreachable 
llvm-svn: 17041
 2004-10-16 18:08:06 +00:00
Chris Lattner d5f67d8ca6 Implement UndefValue class 
llvm-svn: 17040
 2004-10-16 18:07:16 +00:00
Chris Lattner 38a6969894 Add support for the unreachable instruction 
llvm-svn: 17039
 2004-10-16 18:06:43 +00:00
Chris Lattner bcf508cf6f Add new UndefValueVal type 
llvm-svn: 17038
 2004-10-16 18:06:07 +00:00
Chris Lattner 3384f9ad40 Add new UnreachableInst class 
llvm-svn: 17037
 2004-10-16 18:05:54 +00:00
Chris Lattner 278e1dab8e Add new unreachable instruction 
llvm-svn: 17036
 2004-10-16 18:05:37 +00:00
Chris Lattner 9d4d20b71c Add new UndefValue class 
llvm-svn: 17035
 2004-10-16 18:05:25 +00:00
Chris Lattner d57b37d1fa UndefValue's are constants 
llvm-svn: 17034
 2004-10-16 18:05:10 +00:00
Chris Lattner 08b7d5b032 Document unreachable instruction 
llvm-svn: 17033
 2004-10-16 18:04:13 +00:00
Chris Lattner cd196a9444 Add missing 'Instruction Opcodes' bullet to TOC 
Update for changes in LLVM 1.4 bytecode format.

llvm-svn: 17032
 2004-10-16 18:03:55 +00:00
Chris Lattner 1a709646e7 Add a missing dependency 
llvm-svn: 17031
 2004-10-16 17:12:55 +00:00
Chris Lattner 947ecace14 Fix file header 
llvm-svn: 17030
 2004-10-16 16:37:42 +00:00
Chris Lattner 3c3e058406 Be more careful about looking for constants when we really want constantint's. 
llvm-svn: 17029
 2004-10-16 16:07:10 +00:00
Chris Lattner db6a9fdf38 None of these have actually been implemented yet. 
llvm-svn: 17027
 2004-10-16 00:29:30 +00:00
Chris Lattner f22be93428 Move the implementation of the instructions clone methods to this file so 
that the vtables for these classes are only instantiated in this translation
unit, not in every xlation unit they are used.

llvm-svn: 17026
 2004-10-15 23:52:53 +00:00
Chris Lattner a47839f165 Move the implementation of the clone method for these classes to 
Instructions.cpp, so that a vtable is not emitted into every translation unit
that uses the classes.

llvm-svn: 17025
 2004-10-15 23:52:05 +00:00
Misha Brukman b889b2ad97 Fix hyphenation and quoting style for great justice 
llvm-svn: 17024
 2004-10-15 23:22:48 +00:00
Chris Lattner c4f93ac159 There is no reason not to build these in parallel 
llvm-svn: 17023
 2004-10-15 23:22:15 +00:00
Misha Brukman 65c23ee5d3 Add a space between the type and name of value when printing error message 
llvm-svn: 17022
 2004-10-15 23:08:50 +00:00
Chris Lattner 0bc0f1d8de Don't print a bunch of metrics that are meaningless for external functions 
llvm-svn: 17017
 2004-10-15 19:40:31 +00:00
Chris Lattner cf809786dc Fix broken links 
llvm-svn: 17016
 2004-10-15 17:04:28 +00:00
Chris Lattner 15914416ec Instruction select globals with offsets better. For example, on this test 
case:

int C[100];
int foo() {
  return C[4];
}

We now codegen:

foo:
        mov %EAX, DWORD PTR [C + 16]
        ret

instead of:

foo:
        mov %EAX, OFFSET C
        mov %EAX, DWORD PTR [%EAX + 16]
        ret

Other impressive features may be coming later.

This patch is contributed by Jeff Cohen!

llvm-svn: 17011
 2004-10-15 05:05:29 +00:00
Chris Lattner 3b78938b9e Give the X86 JIT the ability to encode global+disp constants. Patch 
contributed by Jeff Cohen!

llvm-svn: 17010
 2004-10-15 04:53:13 +00:00
Chris Lattner 19025d5ad0 Give the X86 asm printer the ability to print out addressing modes that have 
constant displacements from global variables.  Patch by Jeff Cohen!

llvm-svn: 17009
 2004-10-15 04:44:53 +00:00
Chris Lattner df7b984f5a Allow X86 addressing modes to represent globals with offsets. Patch contributed 
by Jeff Cohen!

llvm-svn: 17008
 2004-10-15 04:43:20 +00:00
Chris Lattner 3065220deb Allow machine operands to represent global variables with offsets. This is 
useful when you have a reference like:

int A[100];

void foo() { A[10] = 1; }

In this case, &A[10] is a single constant and should be treated as such.

Only MO_GlobalAddress and MO_ExternalSymbol are allowed to use this field, no
other operand type is.

This is another fine patch contributed by Jeff Cohen!!

llvm-svn: 17007
 2004-10-15 04:38:41 +00:00
Chris Lattner 2152236351 This patch fixes the nasty bug that caused 175.vpr to fail for X86 last night. 
The problem occurred when trying to reload this instruction:

MOV32mr %reg2326, 8, %reg2297, 4, %reg2295

The value of reg2326 was available in EBX, so it was reused from there, instead
of reloading it into EDX.

The value of reg2297 was available in EDX, so it was reused from there, instead
of reloading it into EDI.

The value of reg2295 was not available, so we tried reloading it into EBX, its
assigned register.  However, we checked and saw that we already reloaded
something into EBX, so we chose what reg2326 was assigned to (EDX) and reloaded
into that register instead.

Unfortunately EDX had already been used by reg2297, so reloading into EDX
clobbered the value used by the reg2326 operand, breaking the program.

The fix for this is to check that the newly picked register is ok.  In this
case we now find that EDX is already used and try using EDI, which succeeds.

llvm-svn: 17006
 2004-10-15 03:19:31 +00:00
Chris Lattner 9af0572a37 This patch adds and improves debugging output. No functionality changes. 
llvm-svn: 17005
 2004-10-15 03:16:29 +00:00
Nate Begeman a15c246af9 Better codegen of binary integer ops with 32 bit immediate operands. 
This transformation fires a few dozen times across the testsuite.

For example, int test2(int X) { return X ^ 0x0FF00FF0; }
Old:
_test2:
        lis r2, 4080
        ori r2, r2, 4080
        xor r3, r3, r2
        blr

New:
_test2:
        xoris r3, r3, 4080
        xori r3, r3, 4080
        blr

llvm-svn: 17004
 2004-10-15 00:50:19 +00:00
Misha Brukman aa8f87c83c The field is called `imm22', not simply `imm' 
llvm-svn: 17003
 2004-10-14 22:33:32 +00:00
Misha Brukman b03f27c96c Synthetic instructions RET and RETL need to have all 3 parameters specified 
llvm-svn: 17002
 2004-10-14 22:32:49 +00:00