execute/950503-1.c failing at all optimization levels on x86

[Zack Weinberg <zack at bitmover dot com>]

execute/950503-1.c is a test for proper handling of compile time
shifts of "long long" quantities.  It's failing at all optimization
levels with current CVS.  1.1.2 had no trouble.

The appended assembly dump is cc1 output at -O0 for this test case.
Note the anonymous constants at the top of the file:

.LC0:
        .long -1
        .long 0
        .align 4
.LC1:
        .long -1
        .long 65535

I believe the first constant should have been assembled as

.LC0:
	.long -1
	.long -1

1.1.2 emits the constants in-line, so a direct comparison is not
possible.  I am guessing that this is a bug in expand_expr or its
subroutines.  I can't put my finger on a line of code or a
suspicious-looking change, though.

zw

	.file	"950503-1.c"
	.version	"01.01"
gcc2_compiled.:
	.section	.rodata
	.align 4
.LC0:
	.long -1
	.long 0
	.align 4
.LC1:
	.long -1
	.long 65535
.text
	.align 4
.globl main
	.type	 main,@function
main:
	pushl %ebp
	movl %esp,%ebp
	subl $36,%esp
	pushl %ebx
	movl $16,-4(%ebp)
	movl .LC0,%eax
	movl .LC0+4,%edx
	movb -4(%ebp),%cl
	movb %cl,%bl
	movb %bl,%cl
	shrdl %edx,%eax
	shrl %cl,%edx
	testb $32,%cl
	je .L5
	movl %edx,%eax
	xorl %edx,%edx
.L5:
	movl %eax,-12(%ebp)
	movl %edx,-8(%ebp)
	movl .LC1,%eax
	movl .LC1+4,%edx
	movl %eax,-20(%ebp)
	movl %edx,-16(%ebp)
	movl -12(%ebp),%eax
	cmpl -20(%ebp),%eax
	jne .L4
	movl -8(%ebp),%eax
	cmpl -16(%ebp),%eax
	jne .L4
	jmp .L3
	.p2align 4,,7
.L4:
	call abort
	.p2align 4,,7
.L3:
	addl $-12,%esp
	pushl $0
	call exit
	addl $16,%esp
	.p2align 4,,7
.L2:
	movl -40(%ebp),%ebx
	movl %ebp,%esp
	popl %ebp
	ret
.Lfe1:
	.size	 main,.Lfe1-main
	.ident	"GCC: (GNU) 2.96 19990801 (experimental)"