https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91289
--- Comment #2 from Philipp Spilger <philipp.spilger at kip dot
uni-heidelberg.de> ---
Only reverting the "elf_low" insn changes of this commit leads to no encounter
of the problem, i.e. the following diff "resolves" the problem on
gcc-9_1_0-release.
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index ad80592765d0..f797008eac9b 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -10138,11 +10138,13 @@
"lis %0,%1@ha")
(define_insn "elf_low"
- [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
- (lo_sum:SI (match_operand:SI 1 "gpc_reg_operand" "b")
+ [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r")
+ (lo_sum:SI (match_operand:SI 1 "gpc_reg_operand" "b,!*r")
(match_operand 2 "" "")))]
"TARGET_ELF && !TARGET_64BIT && !flag_pic"
- "la %0,%2@l(%1)")
+ "@
+ la %0,%2@l(%1)
+ addic %0,%1,%K2")
(define_insn "*pltseq_tocsave_<mode>"
[(set (match_operand:P 0 "memory_operand" "=m")
