https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66599
Bug ID: 66599
Summary: on aarch64, some parameters to memory constraints
causes wrong ASM generation
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: romain.gcc at dolbeau dot name
Target Milestone: ---
Created attachment 35813
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35813&action=edit
two inline asm statements for aarch64, working/non-working
Using a memory constraint to some NEON operations on aarch64 (arm64) and
specifying a pointer with an offset causes the generation of invalid assembly.
Compiling the attached example with "gcc-5.1.0 -O2 -c test.c" gives:
#####
/tmp/cc4joSJm.s: Assembler messages:
/tmp/cc4joSJm.s:14: Error: invalid addressing mode at operand 2 -- `ld4
{v20.4s,v21.4s,v22.4s,v23.4s},[x0,64]'
#####
The syntax is invalid (the ",64" inside the brackets is not allowed if I
understand correctly the documentation).
