https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70908
Bug ID: 70908
Summary: [SH] Redirect function call returns
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
In the CSiBE set e.g. in jikespg-1.3/src/spacetab.c there are sequences like:
-----------------
...
bra .L1965
mov.l @r3,r4
.align 1
...
< some constant pool data >
...
.L1965:
jsr @r5
nop
...
-----------------
...
jsr @r5
mov.l @r3,r4
bra .L1965
nop
.align 1
...
< some constant pool data >
...
.L1965:
...
-----------------
In such cases one branch can be avoided by redirecting the return address of
the invoked function like this:
mova .L1965,r0
lds r0,pr
jmp @r5
mov.l @r3,r4
This has to be done after constant pool placement by the sh_reorg pass.
Probably PR 59189 should be fixed first.
