https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70427
--- Comment #1 from Andi Kleen <andi-gcc at firstfloor dot org> --- Created attachment 38109 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38109&action=edit ipa-profile input Here's the source of the miscompiled file from the compiler cc1plus -O2 ipa-profile.i -S unfortunately have to inspect assembler to see the miscompilation: look for ipa_generate_profile_summary then look for get_edge call _ZN11cgraph_node8get_edgeEP6gimple testq %rax, %rax movq %rax, %r15 je .L836 <-------- jump if rax/r15 is 0 testb $2, 96(%rax) je .L837 .L836: <------- it can be here movq 16(%r12), %rax movq 64(%r15), %rsi <---------- BAD same miscompilation here (just with another register). r15 is referenced after being tested for NULL.
