Regressions on master at commit r11-4582 vs commit r11-4575 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: gcc.target/i386/zero-scratch-regs-24.c scan-assembler xorl[ \t]*%edi, %edi
FAIL: gcc.target/i386/zero-scratch-regs-25.c scan-assembler xorl[ \t]*%edi, %edi
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movaps[ \t]*%xmm0, %xmm3
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movaps[ \t]*%xmm0, %xmm4
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movaps[ \t]*%xmm0, %xmm5
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movaps[ \t]*%xmm0, %xmm6
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movaps[ \t]*%xmm0, %xmm7
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movl[ \t]*%edx, %edi
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movl[ \t]*%edx, %esi
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movl[ \t]*%edx, %r8d
FAIL: gcc.target/i386/zero-scratch-regs-26.c scan-assembler movl[ \t]*%edx, %r9d
FAIL: gcc.target/i386/zero-scratch-regs-27.c scan-assembler movl[ \t]*%edx, %edi
FAIL: gcc.target/i386/zero-scratch-regs-27.c scan-assembler movl[ \t]*%edx, %esi
FAIL: gcc.target/i386/zero-scratch-regs-27.c scan-assembler movl[ \t]*%edx, %r8d
FAIL: gcc.target/i386/zero-scratch-regs-27.c scan-assembler movl[ \t]*%edx, %r9d
FAIL: gcc.target/i386/zero-scratch-regs-28.c (test for excess errors)
FAIL: gcc.target/i386/zero-scratch-regs-30.c scan-assembler-times fstp 8
FAIL: gcc.target/i386/zero-scratch-regs-31.c (test for excess errors)

New passes: