The attached test case is causing a spurious dependency violation message from
the assembler. The problem seems to be that the assembler is clearing all qp
mutex relations after a call, but the compiler does not emit .pred.rel.mutex
after them.
$ gcc -O2 -c -save-temps xdisp.c
xdisp.s: Assembler messages:
xdisp.s:114: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 -
127' (impliedf), specific resource number is 16
xdisp.s:113: Warning: This is the location of the conflicting usage
--
Summary: Insufficient qp-mutex declarations
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schwab at suse dot de
GCC target triplet: ia64-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36898
