https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65569
Bug ID: 65569
Summary: Fix for PR target/65240 causes a regression in
building Spec for power4/power5/power6
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
CC: pthaugen at us dot ibm.com
Host: powerpc64-unknown-linux-gnu
Target: powerpc64-unknown-linux-gnu
Build: powerpc64-unknown-linux-gnu
The fix for PR target/65240 causes a regression in building the dealII
benchmark for 64-bit power4/power5/power6 systems.
The reason is the fix eliminated support for floating point constants being in
RTL other than 0.0 on VSX systems. The extenddftf2_fprs pattern expects to be
able to create a 0.0 to do the conversion, and for pre-VSX systems, you can't
create a 0.0 in a register without doing a load.
