If a MI's def is remat as well as spilled, and the store is later deemed dead, mark the def operand as isDead.

llvm-svn: 41083

llvm-svn: 41082

they're not related to eliminating a load.

llvm-svn: 41081

llvm-svn: 41080

llvm-svn: 41079

llvm-svn: 41078

the function.

llvm-svn: 41077

family of functions.  Previous functionality only included checking to
see if the format string was a string literal.  Now we check parse the
format string (if it is a literal) and perform the following checks:

(1) Warn if: number conversions (e.g. "%d") != number data arguments.

(2) Warn about missing format strings  (e.g., "printf()").

(3) Warn if the format string is not a string literal.

(4) Warn about the use se of '%n' conversion.  This conversion is
    discouraged for security reasons.

(5) Warn about malformed conversions.  For example '%;', '%v'; these
    are not valid.

(6) Warn about empty format strings; e.g. printf("").  Although these
    can be optimized away by the compiler, they can be indicative of
    broken programmer logic.  We may need to add additional support to
    see when such cases occur within macro expansion to avoid false
    positives.

(7) Warn if the string literal is wide; e.g. L"%d".

(8) Warn if we detect a '\0' character WITHIN the format string.

Test cases are included.

llvm-svn: 41076

llvm-svn: 41075

llvm-svn: 41074

llvm-svn: 41073

using the count script instead of wc -l

llvm-svn: 41072

llvm-svn: 41070

no more uses within the MBB and the spilled value isn't live out of the MBB.
Then it's safe to delete the spill store.

llvm-svn: 41069

llvm-svn: 41068

spilled value is available for reuse.

llvm-svn: 41067

llvm-svn: 41064

llvm-svn: 41063

llvm-svn: 41062

llvm-svn: 41061

Re-implement trivial rematerialization. This allows def MIs whose live intervals that are coalesced to be rematerialized.

llvm-svn: 41060

llvm-svn: 41059

getStrData() are not null-terminated, and the lengths of these strings should
be determined using getByteLength().

llvm-svn: 41055

llvm-svn: 41054

llvm-svn: 41053

llvm-svn: 41052

llvm-svn: 41051

llvm-svn: 41050

see if the base register is already occupied before assuming it can be
used. This fixes bogus code generation in the accompanying testcase.

llvm-svn: 41049

llvm-svn: 41048

llvm-svn: 41047

Into: inttoptr (i64 0 to i8*)  -> null

This occurs in the example in PR1602.  With this fixed, we now compile
the example in PR1602 into fully "devirtualized" code:

define void @_Z1g1S(%struct.S* noalias  %s) {
entry:        %tmp131415 = getelementptr %struct.S* %s, i32 0, i32 0          ; <i32 (...)***> [#uses=1]        %tmp16 = load i32 (...)*** %tmp131415, align 4          ; <i32 (...)**> [#uses=1]
        %tmp26277 = load i32 (...)** %tmp16             ; <i32 (...)*> [#uses=1]
        %tmp2829 = bitcast i32 (...)* %tmp26277 to void (%struct.S*)*           ; <void (%struct.S*)*> [#uses=1]
        tail call void %tmp2829( %struct.S* %s )
        ret void
}

This still has the vtable dispatch (as required) but does not have any pointer
to method cruft left.

llvm-svn: 41046

llvm-svn: 41043

the list of link time passes to be run, just as for opt, with the
-debug-pass=Arguments option.

llvm-svn: 41040

llvm-svn: 41039

llvm-svn: 41034

better, gives the compiler a chance to validate the cast and reduces warnings
if the user turns on -Wold-style-cast option.

llvm-svn: 41033

llvm-svn: 41029

llvm-svn: 41028

llvm-svn: 41024