Souper says:

; Function: fn1
%0:i32 = var 
%1:i1 = slt %0, 0:i32
%2:i32 = var 
%3:i32 = sdiv 1:i32, %2
%4:i1 = slt %3, %0
%5:i1 = and %1, %4
cand %5 0:i1

COMMAND: /home/regehr/souper/build/souper -stp-path=/usr/local/bin/stp reduce_320/foo.bc

LLVM says:

define void @fn1() #0 {
entry:
  %0 = load i32* @a, align 4, !tbaa !1
  %div = sdiv i32 1, %0
  store i32 %div, i32* @d, align 4, !tbaa !1
  %1 = load i32* @b, align 4, !tbaa !1
  %cmp = icmp slt i32 %1, 0
  %cmp1 = icmp slt i32 %div, %1
  %cmp1. = and i1 %cmp, %cmp1
  %land.ext = zext i1 %cmp1. to i32
  store i32 %land.ext, i32* @c, align 4, !tbaa !1
  ret void
}

COMMAND: /home/regehr/souper/third_party/llvm/Debug/bin/clang -c -w -emit-llvm -O3 reduce_320/foo.c -o reduce_320/foo.bc

C source code:

int a, b, c, d;
void fn1() {
  d = 1 / a;
  c = b < 0 && d < b;
}

x86-64 from LLVM:

fn1:                                    # @fn1
	movl	$1, %eax
	xorl	%edx, %edx
	idivl	a(%rip)
	movl	%eax, d(%rip)
	movl	b(%rip), %ecx
	testl	%ecx, %ecx
	sets	%dl
	cmpl	%ecx, %eax
	setl	%al
	andb	%dl, %al
	movzbl	%al, %eax
	movl	%eax, c(%rip)
	retq

COMMAND: /home/regehr/souper/third_party/llvm/Debug/bin/clang -w -O3 reduce_320/foo.c -S -o -

x86-64 from GCC:

fn1:
	movl	$1, %eax
	movl	$0, c(%rip)
	cltd
	idivl	a(%rip)
	movl	%eax, d(%rip)
	ret

COMMAND: gcc -w -O3 reduce_320/foo.c -S -o -