By propagating the value for the switch condition, LLVM can now build
lookup tables for code such as:

  switch (x) {
    case 1: return 5;
    case 2: return 42;
    case 3: case 4: case 5:
      return x - 123;
    default:
      return 123;
  }

Given that x is known for each case, "x - 123" becomes a constant for
cases 3, 4, and 5.

llvm-svn: 167115

is not a directory, Driver::GetProgramPath() routine does not try to append
the program name as a "path component" to it. It just joins the "prefix" with
the program name and checks the resulting path existence.

The patch reviewed by Rafael Espindola.

llvm-svn: 167114

llvm-svn: 167113

I'm not entirely happy with this solution, but I don't see a smarter way currently.
Fixes PR14214.

llvm-svn: 167112

llvm-svn: 167111

This makes the code match the comments. Resolves a crash in loop idiom (PR14219).

llvm-svn: 167110

Patch by Pete Chou!

llvm-svn: 167109

No testcase, as this is only testable on a C-A15 board.

llvm-svn: 167108

llvm-svn: 167107

llvm-svn: 167106

This patch migrates the strpbrk optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.

llvm-svn: 167105

llvm-svn: 167104

This patch migrates the strlen optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.

llvm-svn: 167103

This patch migrates the strncpy optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.

llvm-svn: 167102

llvm-svn: 167101

llvm-svn: 167100

llvm-svn: 167099

llvm-svn: 167098

that confused external clients.

<rdar://problem/12599528>

llvm-svn: 167097

Headers build phase.

llvm-svn: 167096

CXXMethodDecl but tried to manipulate it
anyway.

<rdar://problem/12601996>

llvm-svn: 167095

so it is recognized correctly.  The second patch needed for <rdar://problem/10652166>.

llvm-svn: 167094

llvm-svn: 167093

IdentifierInfo.

Ee: C++ copy constructors.
llvm-svn: 167092

llvm-svn: 167091

parameters.  Examples of these are:

  struct { } a;
  union { } b[256];
  int a[0];

An empty aggregate has an address, although dereferencing that address is
pointless.  When passed as a parameter, an empty aggregate does not consume
a protocol register, nor does it consume a doubleword in the parameter save
area.  Passing an empty aggregate by reference passes an address just as
for any other aggregate.  Returning an empty aggregate uses GPR3 as a hidden
address of the return value location, just as for any other aggregate.

The patch modifies PPCTargetLowering::LowerFormalArguments_64SVR4 and
PPCTargetLowering::LowerCall_64SVR4 to properly skip empty aggregate
parameters passed by value.  The handling of return values and by-reference
parameters was already correct.

Built on powerpc64-unknown-linux-gnu and tested with no new regressions.
A test case is included to test proper handling of empty aggregate
parameters on both sides of the function call protocol.

llvm-svn: 167090

llvm-svn: 167089

type MachineInstr* and MachineBasicBlock::iterator.

llvm-svn: 167088

Patch by Kai.

llvm-svn: 167087

llvm-svn: 167086

Patch by Kai!

llvm-svn: 167085

This is important for loops in the LAPACK test-suite.
These loops start at 1 because they are auto-converted from fortran.

llvm-svn: 167084

This patch migrates the stpcpy optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.  Note that the
__stpcpy_chk simplifications were migrated in a previous commit.

llvm-svn: 167083

r166198 migrated the strcpy optimization to instcombine.  The strcpy
simplifier that was migrated from Transforms/Scalar/SimplifyLibCalls.cpp
was also doing some __strcpy_chk simplifications.  Those fortified
simplifications were migrated as well, but introduced a bug in the
__stpcpy_chk simplifier in the process.  This happened because the
__strcpy_chk and __stpcpy_chk simplifiers were both mapped to StrCpyChkOpt
which was updated with simplifications that worked for __strcpy_chk, but
not __stpcpy_chk.

This patch fixes the problem by adding proper test coverage and creating a
new simplifier for __stpcpy_chk (instead of sharing one with __strcpy_chk).

llvm-svn: 167082

<rdar://problem/12586188> Make ImportError a special case for "command script import", such that the error message for the exception becomes the error for the entire import operation
and silence the backtrace printout

In the process, refactor the Execute* commands in ScriptInterpreter to take an options object, and add a new setting to not mask out errors so that the callers can handle them directly
instead of having the default behavior

llvm-svn: 167067

RegisterContextKDP_i386 was not correctly writing registers due to missing "virtual" keywords. Added the virtual keywords and made the functions pure virtual to ensure subclasses can't get away without implementing these functions.

llvm-svn: 167066

llvm-svn: 167065

the first source operand is tied to the destination operand.

This is to accurately model the corresponding instructions where the upper
bits are unmodified.

rdar://12558838
PR14221

llvm-svn: 167064

invalid but not caught by isLegalUTF8(): 0xED 0x75 0x84

llvm-svn: 167063

llvm-svn: 167062