[Bug middle-end/65409] [4.8/4.9/5 Regression] ICE in store_field

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65409

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ok, the pessimization (your patch vs. my patch) is only at -O0:
+    movl    %edx, %ecx
+    movl    %ecx, %esi
+    movq    %rdx, %rdi
+    movabsq    $-4294967296, %rcx
+    andq    %rdi, %rcx
+    orq    %rsi, %rcx
+    movq    %rcx, %rdx
is added, for -O1+ the optimizers manage to fix it up.