[Bug lto/78140] [7 Regression] libxul -flto uses 1GB more memory than gcc-6

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78140

--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #11)
> js/src/jit/BaselineCompiler.cpp

Hm, I see the R0 defined as:

# 1
"/home/marxin/BIG/buildbot/slave/source/firefox/js/src/jit/x64/SharedICRegisters-x64.h"
1
# 12
"/home/marxin/BIG/buildbot/slave/source/firefox/js/src/jit/x64/SharedICRegisters-x64.h"
namespace js {
namespace jit {

static constexpr Register BaselineFrameReg = rbp;
static constexpr Register BaselineStackReg = rsp;

static constexpr ValueOperand R0(rcx);

not as an ASM statement.