https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113248
Bug ID: 113248
Summary: RISC-V: Invalid vsetvli fusion using
-mtune=generic-ooo
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ewlu at rivosinc dot com
Target Milestone: ---
Opening a new bug instead of reopening other one since the configuration is
different.
Same testcase as PR111037. Switching cost model should not cause program to
crash
foo:
vsetivli zero,1,e64,m1,ta,ma
vle64.v v1,0(a1)
vmv.s.x v3,a0
vfmv.s.f v2,fa0 # illegal insn still
vadd.vv v1,v1,v1
Configuration:
riscv-sim/-march=rv64gcv/-mabi=lp64d/-mtune=generic-ooo/-mcmodel=medlow
Compilation:
./build-gcc-linux-stage2/gcc/xgcc -B./build-gcc-linux-stage2/gcc/
../gcc/gcc/testsuite/gcc.target/riscv/rvv/vsetvl/pr111037-3.c -march=rv64gcv
-mabi=lp64d -mtune=generic-ooo -mcmodel=medlow -fdiagnostics-plain-output
-O0 --param=riscv-autovec-preference=scalable -march=rv32gc_zve64f_zvfh
-mabi=ilp32d -O3 -ffat-lto-objects -fno-ident -S -o pr111037-3.s
Godbolt:
https://godbolt.org/z/q3779xnab
