On Mon, Jul 14, 2014 at 11:11 AM, Jiong Wang <jiong.w...@arm.com> wrote: > currently the following testcases are disabled for arm target, > > gcc.dg/ira-shrinkwrap-prep-1.c > gcc.dg/ira-shrinkwrap-prep-2.c > gcc.dg/pr10474.c > > the reason is on arm target, register r3 is caller-saved. Normally it does > not need to be saved on entry by the prologue. However if we choose to save > it for padding then we may confuse the compiler into thinking a prologue > sequence > is required when in fact it is not. This will occur when shrink-wrapping if > r3 > is used as a scratch register and there are no other callee-saved writes. > > This situation can be avoided when other callee-saved registers are > available > and r3 is not mandatory if we choose a callee-saved register for padding. > > > Dejagnu improvements > === > -UNSUPPORTED: gcc.dg/ira-shrinkwrap-prep-1.c > -UNSUPPORTED: gcc.dg/ira-shrinkwrap-prep-2.c > +PASS: gcc.dg/ira-shrinkwrap-prep-1.c (test for excess errors) > +PASS: gcc.dg/ira-shrinkwrap-prep-1.c scan-rtl-dump ira "Will split live > ranges of parameters" > +PASS: gcc.dg/ira-shrinkwrap-prep-1.c scan-rtl-dump ira "Split live-range of > register" > +PASS: gcc.dg/ira-shrinkwrap-prep-1.c scan-rtl-dump pro_and_epilogue > "Performing shrink-wrapping" > +PASS: gcc.dg/ira-shrinkwrap-prep-2.c (test for excess errors) > +PASS: gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump ira "Will split live > ranges of parameters" > +PASS: gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump ira "Split live-range of > register" > +PASS: gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump pro_and_epilogue > "Performing shrink-wrapping" > -UNSUPPORTED: gcc.dg/pr10474.c > +PASS: gcc.dg/pr10474.c (test for excess errors) > +PASS: gcc.dg/pr10474.c scan-rtl-dump pro_and_epilogue "Performing > shrink-wrapping" > > ok for trunk ?
This is OK Ramana > > thanks. > > -- Jiong > > gcc/ > * config/arm/arm.c (arm_get_frame_offsets): If both r3 and other > callee-saved > registers are available for padding purpose, and r3 is not mandatory, > then > prefer use those callee-saved instead of r3. > > gcc/testsuite/ > * gcc.dg/ira-shrinkwrap-prep-1.c (target): Add arm_nothumb > * gcc.dg/ira-shrinkwrap-prep-2.c (target): Add arm_nothumb > * gcc.dg/pr10474.c (target): Add arm_nothumb
