llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-09 13:33:17 +00:00

History

Manman Ren e6c3cc8dc5 ARM: tail-call inside a function where part of a byval argument is on caller's

local frame causes problem.

For example:
void f(StructToPass s) {
  g(&s, sizeof(s));
}
will cause problem with tail-call since part of s is passed via registers and
saved in f's local frame. When g tries to access s, part of s may be corrupted
since f's local frame is popped out before the tail-call.

The current fix is to disable tail-call if getVarArgsRegSaveSize is not 0 for
the caller. This is a conservative approach, if we can prove the address of
s or part of s is not taken and passed to g, it should be okay to perform
tail-call.

rdar://12442472


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165853 91177308-0d34-0410-b5e6-96231b3b80d8

2012-10-12 23:39:43 +00:00

ARM

ARM: tail-call inside a function where part of a byval argument is on caller's

2012-10-12 23:39:43 +00:00

CellSPU

Fix broken tests.

2012-10-02 15:49:34 +00:00

CPP

test commit

2012-07-18 17:53:05 +00:00

Generic

BranchProb: modify the definition of an edge in BranchProbabilityInfo to handle